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Electric Circuit Question & Answers

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This article lists 100 Electric Circuit MCQs for engineering students. All the Electric Circuit Questions & Answers given below includes solution and link wherever possible to the relevant topic.

An electric circuit is a loop containing electric components that interact with each other to drive the output load connected. This circuit consists of active and passive components like current source, voltage sources, AC or DC sources that generate power to dependent components such as resistors, capacitors, inductors, and more. This combination of electrical components forms a device oscilloscope, motors, batteries, or specific components IC’s, rectifiers, diodes, etc.

These electrical components can be connected in series or in parallel. In a serial connection, the components are connected in such a way where the output of one terminal is given as input to another terminal, and in parallel connection, the components are connected one above the other thus, varying in output result. A few of the benefits provided by an electrical circuit include reliability, maximum efficiency generated, and more reliability and they limit in terms of area, power dissipation, health hazard, and breakdowns. The application of an electrical circuit includes motors, TV, electronic appliances, cars, automobiles, etc.

1). An electric circuit operates in ___ type of connectivity configuration?
HintAn electric circuit operates in a short connectivity type configuration, allowing current to flow through the circuit.
2). Which of the following are the standard components of an electric circuit?
HintThe standard components of an electric circuit are voltage and current source, passive components such as RLC, and connecting wires.
Read more about RLC
3). An electrical circuit components are classified into ___ types?
HintElectrical circuit components are classified into 3 types namely active, passive and electromechanical.
4). Which of the following electrical circuit components operate using dynamic parts?
HintElectromechanical electrical circuit components operate using dynamic parts.
5). Which of the following are the examples of electro mechanical components?
HintExamples of electro mechanical components motors, magnetic components, crystals, ultrasonic motor, etc.
Read more about Motors
6). How many types of independent power source phases are used in an electric circuit?
HintThere are 2 types of independent power source phases used in an electric circuit namely AC and DC power sources.
7). A resistor has minimum of __ number of terminals?
HintA resistor has a minimum of 2 terminals namely input and output.
8). Which of the following is the dependent sources of an current type amplifier?
HintThe current controlled type current-based source is the dependent source of a current type amplifier.
9). Which of the following is the dependent sources of an trans-resistance type amplifier?
HintThe current controlled type voltage-based source is the dependent source of a trans-resistance type amplifier.
10). Which of the following is the dependent sources of an trans-conductance type amplifier?
HintVoltage-controlled type current-based source is the dependent source of a trans- conductance type amplifier.
11). Which of the following is the dependent sources of an voltage type amplifier?
HintVoltage-controlled type voltage-based source is the dependent source of a voltage type amplifier.
12). An undesirable of disturbances in a signal that effects the quality of signal is called_______
HintAn undesirable disturbance in a signal that affects the quality of the signal is called noise.
13). Which of the following is defined as higher value of rate of change of output is _____
HintThe higher value of the rate of change of the output is called the slew rate.
14). Which of the following is the SI units of slew rate?
HintThe SI units of slew rate are volts/seconds or amperes/seconds.
15). A radio type receiver is also called as_____
HintA radio type receiver is an electric component also named a radio or radio type receiver or a wireless type receiver.
16). What is the form of input applied to an radio type receiver?
HintA radio form of input is applied to a radio-type receiver.
17). What is the form of output obtained in an radio type receiver?
HintThe output obtained in an radio-type receiver is in usable form can be in electric, 0’s or 1’s and digital.
18). Which of the following main component is used in radio type receiver?
HintAn antenna is the main component is used in a radio-type receivers.
19). Which of the following component of a radio type receiver removes signal noise?
HintA filter in radio type receiver removes signal noise.
Read more about filter
20). Which of the following are the applications of a radio receiver?
HintThe applications of a radio receiver are the mobile phone, tv, radio, and more.

Electric Circuit Questions and Answers

21). An electro mechanical circuit depends on __ properties?
HintAn electromechanical circuit depends on its mechanical and electrical properties.
22). Which of the following are the applications of an electromechanical component?
HintThe applications of an electromechanical component are motors, transformers, windmills, etc.
23). Electro mechanical devices works similar to ____ component?
HintElectromechanical devices work similarly to a switch also called a relay.
24). An electronic device that generates periodic waves is called _____
HintAn electronic device that generates periodic waves is called an oscillator.
25). Which of the following is the source conversion of an oscillator?
HintThe source conversion of an oscillator is from DC to AC.
26). Which of the following are the applications of an oscillator?
HintThe applications of an oscillator includes clock, calculator and computers.
27). Which of the following is the frequency of operation of a low frequency type oscillator?
HintThe frequency of operation of a low frequency type oscillator is 20Hz.
28). Which of the following is the frequency of operation of audio frequency type oscillator?
HintThe frequency of operation of audio frequency type oscillator is 16-20Hz.
29). Which of the following is the frequency of operation of a audio frequency type oscillator?
HintThe frequency of operation of an audio frequency type oscillator is 100KHz-100GHz.
Read more about inverter
30). An oscillator generating AC power supply using DC source is called ____
HintAn oscillator generating AC power supply using a DC source is called an inverter.
31). An oscillator’s are basically classified into _____
HintAn oscillator is basically classified into 2 types periodic and aperiodic oscillators.
32). Aperiodic type oscillators are also called as_____
HintAperiodic type oscillators are also called nonlinear type oscillators or relaxation type oscillators.
33). Which of the following is the frequency of operation of an crystal oscillator?
HintThe frequency of operation of an crystal oscillator is 32kHz to 150 MHz
34). Which of the following are the applications of an relaxation type oscillator?
HintThe applications of a relaxation type oscillator are a square wave oscillator, triangle oscillator, and sawtooth type oscillator.
35). Which of the following is the energy component of oscillator?
HintThe energy components of oscillator are inductor, capacitor and relay.
Read more about relay
36). Which of the following component in oscillator stores the charge for short time?
HintThe capacitor component in the oscillator stores the charge for a short time.
37). Which of the following is the application of square wave type relaxation oscillator?
HintThe application of square wave type relaxation oscillators is timers, counters, and ADC.
38). A tunnel diode is also called as______
HintA tunnel diode is also called an Esaki diode.
39). The resistance value of tunnel diode is ______polarity
HintThe resistance value of the tunnel diode is negative.

Electric Circuit Important MCQ's with Hints

40). A tunnel type diode works on ____ principle?
HintA tunnel-type diode works on quantum mechanics called the tunnel effect.
41). How many terminals do tunnel diode have?
HintA tunnel diode has 2 terminals namely anode and cathode.
42). Who invented tunnel diode?
HintLeo Esaki, Uriko Kurose, Takashi Suzuki scientists have invented tunnel diode.
43). Tunnel diode has ___ quantity of PN impurities?
HintThe tunnel diode has a heavy quantity of PN impurities.
44). Which of the following element is used in tunnel diode?
HintThe element is used in tunnel diode is Germanium, Silicon and Gallium.
45). Which of the following is the application of battery in electrical circuit?
HintThe application of batteries in electrical circuits includes flashlights, mobiles, and motors.
46). Batteries are classified in to ___ types?
47). Which of the following type of battery can be recharged when charge becomes zero?
HintA secondary type of battery can be recharged when the charge becomes zero.
48). Which of the following type of battery cannot be recharged when charge becomes zero?
HintA primary type of battery cannot be recharged when the charge becomes zero.
49). Which of the following are the applications of primary type battery?
HintThe applications of primary type batteries include telegram, inverters, and remote cells.
50). Which of the following are the applications of primary cells?
HintThe applications of primary cells include zinc carbon battery and alkaline battery.
51). A secondary battery is also called as ___
HintA secondary battery is also called a secondary cell or a rechargeable battery.
52). A primary battery is also called as _____
HintA primary battery is also called a primary cell or a non-rechargeable battery.
53). Which of the following are the applications of rechargeable batteries?
HintThe applications of rechargeable batteries include lead-acid batteries, gel batteries, and absorbed batteries.
54). Which of the following is the capacity of lead acid battery?
HintThe capacity of the lead acid battery is 10Ah.
55). Which of the following are the types of cells?
HintCells are available in different types namely galvanic, flow, fuel, electrostatic, etc.
56). Which of the following are the types of wet cell?
HintThe types of wet cells include Nickle cadmium cell, lead-acid cell, grove cell, etc.
57). Which of the following are the types of dry cells?
HintThe types of dry cells include zinc-carbon cells, leclanche cells,s, and zinc manganese dioxide cells.
58). What is the voltage of leclanche cell?
HintThe voltage of leclanche cell is 1.5V.
59). The value of temperature operated by molten salt type cell is ___
HintThe value of temperature operated by molten salt type cell is high.
60). Circuit analysis in an electrical circuit can be performed using ___?
HintCircuit analysis in an electrical circuit can be performed using nonlinear and linear types.
61). A electrical network comprises of _____
HintAn electrical network comprises both active and passive elements containing sources, resistors, capacitors, inductors, etc.
62). A components that joins 2 nodes in circuit analysis is called________
HintA component that joins 2 nodes in circuit analysis is called a branch.
63). A point in an electric circuit that contains multiple components connected at a point is called____
HintA point in an electric circuit that contains multiple components connected at a point is called a node.
64). A group of nodes in a network connected together to form a loop, so that no other loop exists is called____
HintA group of nodes in a network-connected together to form a loop, so that no other loop exists is called mesh.
65). A pair of terminals on input and on the output of an electrical component where current flows into and out of is called___
HintA pair of terminals on input and on the output of an electrical component where current flows into and out of is called port.
66). How many configurations can an electrical circuit be analyzed?
HintIn 2 configurations an electrical circuit is analyzed namely star and delta configuration.
67). In how many ways can a electrical components connected?
HintElectrical components can be connected in 2 ways, series, and parallel configuration.
68). What is the formula for serial impedance?
HintThe formula for serial impedance is Z1+Z2+Z3+……+Zn.
69). What is the formula for parallel impedance?
HintThe formula for parallel impedance is 1/Z1+1/Z2+1/Z3+……….+1/Zn.
70). What is the units of resistance?
HintThe unit of resistance is ohms.

Electric Circuit MCQ's for Interviews

71). What is the units of capacitance?
HintThe unit of capacitance is Farads.
72). What is the units of Energy?
HintThe units of energy is Joules.
73). What is the units of Charge?
HintThe units of charge is Colum’s.
74). What is the formula of ohms law?
HintThe formula of ohms law is V=IR.
Read more about ohms law
75). Which of the following are the applications of electric circuit?
HintThe applications of electric circuit are motor, TV and batteries.
76). Which of the following are linear elements?
HintExamples of linear elements include a resistor, capacitor, and inductor.
77). Which of the following are examples of non linear elements?
HintDiodes and transistors are examples of non linear elements.
78). Which of the following are the examples of bilateral elements?
HintThe examples of bilateral elements are voltage source, capacitance, resistance, inductance, and current source.
79). Which of the following are the examples of unilateral elements?
HintExamples of unilateral elements are rectifiers, silicon diode and voltage sources.
80). If VI relationship is equal and current flows in two direction is called ____ element?
HintIf VI relationship is equal and current flows in two directions is called a bilateral element.
81). If VI relationship is not equal and current flows in one direction is called ____ element?
HintIf the VI relationship is not equal and the current flows in one direction is called the uni lateral element.
82). Which of the following are the characteristics of lumped elements?
HintThe characteristics of lumped elements are small size, electrically separated, and continuous action.
83). A resistance ___ the flow of current?
HintResistance opposes the flow of current.
84). Ohms law defines relation between ____
HintOhms law defines the relation between current, voltage, and resistance.
85). What is the formula of current I, conductance G and voltage V?
HintThe formula of current I, conductance G and voltage V is i=GV.
86). An inductance opposes ___ component of current through a conductor?
HintAn inductance opposes the magnitude and amplitude component of current through a conductor.
87). Which of the following are the components of a capacitor?
HintThe components of a capacitor are parallel plates, dielectric materials and terminals.
88). Which of the following is the formula of q-charge, C-capacitance and voltage-v?
HintThe formula of q-charge, C-capacitance and voltage-v is q= CV.
89). If the voltage across capacitor is maintained constant what is the value of current in capacitance?
HintIf the voltage across capacitor is maintained constant then the value of current in capacitance is zero.
90). Which of the following is the formula of Kirchhoff’s current law when i1,i2 are incoming currents and i3, i4 are output currents?
HintThe formula of Kirchhoff’s current law when i1,i2 are incoming currents and i3, i4 are output currents i1+i2=i3+i4
91). Kirchhoff’s laws are classified in to how many types?
HintKirchhoff’s laws are classified in to 2 types Kirchhoff’s current and voltage laws.
92). When electrical components such as RLC are complemented with lines of segment in a network the then the topology is called_____
HintWhen electrical components such as RLC are complemented with lines of segment in a network the then the topology is called graph.
93). In graph voltage sources are ____
HintIn the graph, voltage sources are short-circuited or closed.
94). In graph current sources are _____
HintIn graph, current sources are open circuited.
95). A twig is also called as ___
HintA twig is also called a tree branch.
96). If the branch that are not a part of tree of a co-tree is called ______
HintIf the branch that is not a part of the tree of a co-tree is called a co-tree.
97). Link is also called ____
HintLink is also called chord.
98). Nodes are represented as ____ during electric circuit representation
HintNodes are represented as dots in an electric circuit representation.
99). Twigs are represented as ____ during electric circuit representation
HintTwigs are represented as dark lines in an electric circuit representation.
100). Links are represented as ____ during electric circuit representation
HintLinks are represented as dotted in an electric circuit representation.