ELECTRIC CIRCUITS MCQ

Electric circuits MCQ provides mock tests in electrical circuits in preparation for professional and competitive examinations. RandomMCQ helps with theoretical, conceptual, and analytical concepts for self-assessment in Electrical Circuits.

Electric circuits MCQ is a revision guide that covers topics like electric generation and storage, electrical transmission, dc and ac circuits and components, resistances, inductance and capacitance, electric motors, transformers, etc.

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RandomMCQ is an online reviewer that provides hundreds of multiple choice questions in electric circuits, both dc and ac. The multiple choice questions will help students familiarize with electric circuit concepts

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Electric Circuits

You have to replace 1500 ohms resistor in radio. You have no 1500 ohms resistor but have several 1000 ohms ones. which you would connect
It is defined as a closed path in which magnetic induction or flux flows
How much voltage does a standard automobile battery usually supply ?
A cell, that can be repeatedly recharged by supplying it with electrical energy, is known as a:
The resistivity of a conductor         with an increase in temperature.
Out of the following which is an insulating material ?
The total resistance of four 68 ohm resistors wired in parallel is:
Out of the following which is not a poor conductor
Two resistors are connected in parallel and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is:

The most common primary cell in use today is the carbon-zinc or flashlight cell. This cell can be recharged

What do the first three-color bands on a resistor indicate?
Two resistors are said to be connected in series when
The total resistance of resistors connected in series is:
Which tolerance rating would a high-quality resistor have?
To increase the current capacity of a cell, several cells should be connected in:
A dry cell has a nominal voltage of 1.5 volt. When supplying a great deal of current, the voltage may drop to 1.2 volt. This is due to the cell's:
Which component has a positive and a negative side?
The material listed, which will most readily allow an electric current to flow, is called?
Conductance is reciprocal of
What is the best conductor among the following materials?
Electric pressure is also called
If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?
Which series combination of resistors would replace a single 120 ohm resistor?
A resistor with a colour code of brown, black, and red, would have a value of:
What are the possible values of a 100 ohm resistor with a 10% tolerance?
An important difference between a conventional flashlight battery and a lead acid battery is that only the lead acid battery:
If a carbon resistor's temperature is increased, what will happen to the resistance?
_____ is the unit of electrical current flow
Which of the following material has nearly zero temperature co-efficient of resistance?
The internal resistance of an ideal voltage source is
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RESISTORS AND RESISTANCE

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Category: ELECTRICAL 2

When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of

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Category: ELECTRICAL 2

One advantage of replacing a 50 ohm resistor with a parallel combination of two similarly rated 100 ohm resistors is that the parallel combination will have

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Category: Electrical 5

Those resistors, which values change with applied voltage and temperature are called

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Category: ELECTRICAL 2

If a carbon resistor's temperature is increased, what will happen to the resistance?

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Category: Electrical 5

Ohm's law states that resistor 'R' is directly proportional to

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Category: Electric Circuits

The internal resistance of an ideal voltage source is

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Category: ELECTRICAL 2

Which tolerance rating would a high-quality resistor have?

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Category: Electric Circuits

Which of the following material has nearly zero temperature co-efficient of resistance?

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Category: ELECTRICAL 2

Why do resistors sometimes get hot when in use?

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Category: Electric Circuits

Two resistors are said to be connected in series when

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Category: Physics Practice Test 5

The voltage of a device having resistance 5 Ω and current 4 A will be

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Category: Physics Practice Test 5

When the condition R1/R2 = R3/R4 is satisfied, the current in the galvanometer of Wheatstone bridge is

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Category: ELECTRICAL 2

A resistor with a colour code of brown, black, and red, would have a value of:

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Category: ELECTRICAL 2

The total resistance of four 68 ohm resistors wired in parallel is:

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Category: ELECTRICAL 2

Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that:

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Category: ELECTRICAL 2

The total resistance of resistors connected in series is:

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Category: ELECTRICAL 2

In a parallel circuit with a voltage source and several branch resistors, how is the total  current related to the current in the branch resistors?

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Category: Electric Circuits

You have to replace 1500 ohms resistor in radio. You have no 1500 ohms resistor but have several 1000 ohms ones. which you would connect

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Category: Physics Practice Test 5

The Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 Ω. If suddenly the potential difference falls to 1.8 V, its internal resistance will be

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Category: Electrical 5

A 5.0 ohm of resistor has current i=6.0sinωt(A), than power dissipated by the circuit will be

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Category: ELECTRICAL 2

What are the possible values of a 100 ohm resistor with a 10% tolerance?

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Category: Electric Circuits

The resistance of a conductor varies inversely as

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Category: Physics Practice Test 5

If Current is 0.75 A when a battery of 1.5 V is connected to the wire of 5 m having cross sectional area 2.5 × 10-7 m², the wire will have a resistivity of

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Category: ELECTRICAL 2

If two 10 ohm resistors are connected in series with a 10 volt battery, the power consumption would be:

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Category: Physics Practice Test 5

 Bar of iron 2 cm × 2 cm having area 4 cm² and resistivity of 11 × 10^-8 Ω meter will have resistance of

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Category: ELECTRICAL 2

Which series combination of resistors would replace a single 120 ohm resistor?

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Category: ELECTRICAL 2

What does the fourth color band on a resistor mean?

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Category: ELECTRICAL 2

What do the first three-color bands on a resistor indicate?

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Category: ELECTRICAL 2

What voltage would be needed to supply a current of 200 mA, to operate an electric lamp which has a resistance of 25 ohms?

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Category: Electrical 5

 A 4.0 ohm of resistor has current i=2.5sinωt(A), than voltage across the circuit will be

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Inductance and Capacitance

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In a series RLC circuit, what is the condition of the circuit if there is high impedance, low current, and low reactance voltages?

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A gang capacitor is a variable capacitor in which capacitance is varied by changing the

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Resonance is the condition that exists when:

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A power-supply filter has a capacitor of 10 microfarad. What is the capacitive reactance of this capacitor to a frequency of 60 hertz?

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A choke coil of 4.25 microhenrys is used in a circuit at a frequency of 200 MHz. Its reactance is approximately:

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How does a capacitor react to AC?

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Three 15 microfarad capacitors are wired in series. The total capacitance of this arrangement is:

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If two equal-value capacitors are connected in series, what is their total capacitance?

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If two equal-value inductors are connected in series, what is their total inductance?

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Elements which doesn't generate power but dissipates, store and release it are

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A passive two-terminal electrical component used to store energy electro- statically in an electric field is

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The property of an?electrical conductor by which a change in curren-t through it induces an?electromotive force in both the conductor itself and in any nearby conductors

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Voltage of inductance can be represented as

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The process in which change in current in one inductor induces a voltage in another nearby inductor is termed as

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In order to maximize the charge of capacitor, dielectric must have

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An inductor is basically a coil of wire that surrounds a magnetic or non- magnetic material called the

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An element that consists of two conducting plates separated by an insulator is called

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Which capacitors produce very high capacitance?

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 If the capacitor has a charge of 0.1 C at 5 V. What will be its capacitance?

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A 10H inductor changes its current by 4 A in 0.5 s. The voltage produced at the terminals of the inductor will be

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The induction of an inductor depends on its

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The terms coil and choke are also used for

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 The voltage induced in the inductor is the product of

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Capacitors and Inductors are known as

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What charge is on a 8 F capacitor when the voltage is 120 V?

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Capacitance is measured in

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The plot of the current-voltage relationship is not a straight line in the

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AC Circuit and Motors

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 The injected e.m.f. in the rotor of induction motor must have

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An induction motor is identical to

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The good power factor of an induction motor can be achieved if the average flux density in the air gap is

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An induction motor with 1000 r.p.m. speed will have_____ poles

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 In case of the induction motors the torque is

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The term ‘cogging’ is associated with

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Star-delta starting of motors is not possible in case of

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The efficiencies of transformers compared with that of electric motors of the same power are

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In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of

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Minimum voltage regulation occurs when the power factor of the load is

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The hum in a transformer is mainly attributed to

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If a transformer is continuously operated the maximum temperature rise will occur in

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Which of the following is the most likely source of harmonics in a transformer ?

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Which of the following loss in a transformer is zero even at full load ?

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The noise produced by a transformer is termed as

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Which of the following parts of a transformer is visible from outside ?

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A 100% efficient transformer has a turns ratio of 1/5. If the secondary current is 50 mA, the primary current is:

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The voltage induced in a conductor moving in a magnetic field is at a maximum when the movement is:

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In a mains power transformer, the primary winding has 250 turns, and the secondary has 500. If the input voltage is 110 volts, the likely secondary voltage is:

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A transformer has a 240 volt primary that draws a current of 250 mA from the mains supply. Assuming no losses, what current would be available from a 12 volt secondary

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If no load is attached to the secondary winding of a transformer, what is current in the primary winding called?

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A power-supply filter has a capacitor of 10 microfarad. What is the capacitive reactance of this capacitor to a frequency of 60 hertz?

23 / 23

A 5.0 ohm of resistor has current i=6.0sinωt(A), than power dissipated by the circuit will be

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