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Free download in PDF Electric Circuits Multiple Choice Questions & Answers for competitive exams. These short objective type questions with answers are very important for competitive exams like IIT-JEE, NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
(1)
A 2 ohms resistor having 1 ampere current will dissipate the power of
[A]
2 Watts
[B]
2 Joules
[C]
1 Watt
[D]
1 Joule
(2)
A 1 H inductance carrying the current of amperes will store the energy of
[A]
2 Watts
[B]
2 Joules
[C]
4 Watts
[D]
4 Joules
(3)
If two winding having self-inductances L1 and L2, and a mutual inductance m are connected in series will opposite, then the total inductance of series combination will be
[A]
L1 + L2 - 2M
[B]
L1 + L2 + 2M
[C]
L1 - L2 + 2M
[D]
L1 + L2 – M
(4)
An inductive circuit resistance 2 ohms and inductance 0.5 H is connected to a 250 volts, 50 Hz supply. What capacitance will be placed in parallel to produce resonance?
[A]
700 micro-farad
[B]
750 micro-farad
[C]
701 micro-farad
[D]
714 micro-farad
(5)
Which of the following statement is true?
[A]
A galvanometer with low resistance in series is an ammeter
[B]
A galvanometer with high resistance in series is an ammeter
[C]
A galvanometer with high resistance in parallel is a voltmeter
[D]
A galvanometer with low resistance in parallel is a voltmeter
Answer: A galvanometer with low resistance in series is an ammeter
(6)
A passive network
[A]
Has no current source
[B]
Has no e.m.f. source
[C]
Has neither of the above
[D]
Has either of the above
Answer: Has no e.m.f. source
(7)
In the circuit given below, the ammeter reads 0.1 ampere and voltmeter 10 volts. The internal resistance of the ammeter is 1 ohm and that of voltmeter is 500 ohms. What is the value of R?
[A]
110 ohms
[B]
120 ohms
[C]
115 ohms
[D]
125 ohms
(8)
Mass in the MKS unit system is analogous to
[A]
Resistance
[B]
Voltage
[C]
Inductance
[D]
Capacitance
(9)
A damped oscillation has the equation I = 50 e-10tsin 628 t. What will be the frequency of a oscillation?
[A]
50 Hz
[B]
75 Hz
[C]
100 Hz
[D]
60 Hz
(10)
A 0.5 meter long conductor carrying a current of 2 amperes is placed in a magnetic field having the flux density of 0.05 wb/m2. What will be the amount of force experienced by the conductor?
[A]
1 New
[B]
2 New
[C]
0.05 New
[D]
0.5 New
(11)
If a coil has a resistance of 10 ohms and an inductance of 1 H, what will be the value of current 0.1 second after switching on a 500 V d.c. supply?
[A]
6.32 A
[B]
3.16 A
[C]
3.7 A
[D]
4.0 A
(12)
An electrical circuit is shown below, what will be the power dissipation in the circuit assuming P as power across R2 ?
[A]
3/4 P
[B]
2/3 P
[C]
4/3 P
[D]
3/2 P
(13)
If two resistances connected in parallel and each dissipates 10 watts the total power supplied by the voltage source equals
[A]
5 watts
[B]
10 watts
[C]
20 watts
[D]
100 watts
(14)
If a parallel circuit is open in the main line, the current
[A]
Increases in each branch
[B]
Is zero in all branches
[C]
Is zero in the highest resistive branch
[D]
Increases in the branch of the lowest resistance
Answer: Is zero in all branches
(15)
In which of the following circuits most current will be produced by the voltage source?
[A]
5 volts across a 5 ohm resistance
[B]
5 volts across two 5 ohm resistance in series
[C]
5 volts across two 5 ohm resistance in parallel
[D]
500 volts across a 1 M Ω resistance
Answer: 5 volts across two 5 ohm resistance in parallel
(16)
If a wire conductor of 0.1 ohm resistance is doubled in length, its resistance becomes
[A]
0.1 ohm
[B]
0.02 ohm
[C]
0.2 ohm
[D]
0.05 ohm
(17)
The square waveform of current has following relation between r.m.s. value and average value
[A]
R.M.S. value of current is greater than the average value
[B]
R.M.S. value of current is less than the average value
[C]
R.M.S. value of the current is to average value
[D]
There is no meaning of r.m.s value and average value for square wave
Answer: R.M.S. value of the current is to average value
(18)
The transient currents are associated with the
[A]
Applied voltage to the circuit
[B]
Changes in the stored energy in the inductors and capacitors
[C]
Resistance of the circuit
[D]
Impedance of the circuit
Answer: Changes in the stored energy in the inductors and capacitors
(19)
A closed switch has a resistance of
[A]
Infinity
[B]
Zero
[C]
About 500 ohms
[D]
None Of The Above
(20)
Two 500 ohms, 1 watt resistors are connected in parallel. Their combined resistance and wattage rating will be
[A]
5000 ohms, 1 watt
[B]
250 ohms, 2 watts
[C]
1000 ohms, 2 watts
[D]
500 ohms, 2 watts
Answer: 250 ohms, 2 watts
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