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MCQ Questions for CBSE Class 12 with Answers
MCQ Questions for CBSE Class 11 with Answers
MCQ Questions for CBSE Class 10 with Answers
MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
MCQ Questions for CBSE Class 7 with Answers
MCQ Questions for CBSE Class 6 with Answers
MCQ Questions for CBSE Class 5 with Answers
MCQ Questions for CBSE Class 4 with Answers
MCQ Questions for CBSE Class 3 with Answers
MCQ Questions for CBSE Class 2 with Answers
MCQ Questions for CBSE Class 1 with Answers
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Inductance Class 12 MCQ Questions With Answers
1.
Inductance is measured in __________.
Ohms
Farads
henrys
RPMs
2.
__________ affects a DC circuit only when the current is first turned on, turned off, or when there is a charge in the load resistance.
capacitance
Inductance
A time delay
A relay
3.
Which of the following is the correct formula for calculating total parallel inductive reactance in a parallel circuit?
XLT = XL1 + XL2 + XL3 ...
XLT = XL1 * XL2 * XL3...
XLT = 1/[(1/XL1) + (1/XL2) + (1/XL3) ... ]
XLT = (1/XL1) + (1/XL2) + (1/XL3) ...
4.
Magnetic flux depends on
Magnetic Field
Area
Angle between Magnetic Field and Area Vector
All of the above
5.
Where is the energy being stored in an inductor carrying a steady current ?
In the electric field of the coil
In the circuit
In the power supply
In the magnetic field of the coil
6.
Which of the following has the largest inductance?
A solenoid of radius 1 cm, length 5 cm, and with 100 turns of wire per centimeter
A solenoid of radius 3 cm, length 1 cm, and with 100 turns of wire per centimeter
A solenoid of radius 2 cm, length 2 cm, and with 100 turns of wire per centimeter
A solenoid of radius 1 cm, length 1 cm, and with 200 turns of wire per centimeter
A solenoid of radius 2 cm, length 5 cm, and with 100 turns of wire per centimeter
7.
If you wrap more coils around an electromagnet, it will become...
brighter
stronger
weaker
invisible
8.
In the diagram shown, which current is changingmore rapidly?
Current 𝐼1
Current 𝐼2
Both are constant
Both are changing at the same rate
Both are zero
9.
A 5.6 mH inductor is connected to a current source.What is the magnitude of the voltage in the inductorat time 𝑡 = 4.0 𝑠 if the current is 𝐼(𝑡) = 10.0 + 9.0𝑡 −3.0𝑡^2?
11 mV
22 mV
84 mV
58 mV
185 mV
10.
Energy can be stored in many ways. What is theprimary energy storage form of an inductor?
Kinetic
Electric field
Magnetic field
Gravitational field
Spring displacement
11.
A 7.2 mH inductor is connected to a current source. What is the magnitude of the voltage in the inductor at time 𝑡 = 3.0 𝑠 if the current is 𝐼(𝑡) = 5.0 + 7.0𝑡 − 2.0𝑡^2?
22 mV
36 mV
58 mV
90 mV
230 mV
12.
Which of the following are units for inductance?I. HenryII. Joules/(Ampere)2III. Volt . second/Ampere
I only
II only
III only
I and II only
I, II and III
13.
The voltage induced across an inductor is inversely proportional to the rate of change of magnetic flux.
true
false
14.
The diagram shows an inductor that is part of a circuit. The direction of the emf induced in the inductor is indicated. Which of the following is possible?
The current is constant and rightward
The current is constant and leftward
The current is increasing and rightward
The current is increasing and leftward
None of the above
15.
How much energy is stored in a long solenoid with 660 turns, length 𝐿 = 3.2 𝑚, and cross sectional area 𝐴 = 121 𝑐𝑚^2, when the current in it is 𝐼 = 85 𝐴?
1.10 𝑚𝐽
1.10 𝑘𝐽
9.1 1𝑘𝐽
5.21 𝑘𝐽
7.48 𝑘𝐽
16.
The most practical way to change the magnetic field of an inductor is to increase or decrease the current through the coil.
false
true
17.
A 10-turn ideal solenoid has an inductance of 3.5 mH. When the solenoid carries a current of 2.0 A the magnetic flux through each turn is:
0 Wb
3.5 x 10^–4 Wb
7.0 x 10^–4 Wb
7.0 x 10^–3 Wb
7.0 x10^–2 Wb
18.
Current is maximum in AC generator when
Area Vector is parallel to magnetic field
Area Vector is Antiparallel to magnetic field
Area Vector is 120 degree with magnetic field
Area Vector is Perpendicular to magnetic field
19.
A long narrow solenoid has length ℓ and a total of N turns, each of which has cross-sectional area A. Its inductance is:
μ0 N^2 Aℓ
μ0 N^2 A/ℓ
μ0 NA/ℓ
μ0 N^2 ℓ/A
none of these
20.
Which of the following factors DOES NOT affect the self inductance of a coil?
The length of the coil
The current flows in the coil
The number of turn of the coil
The cross sectional area of the coil
21.
The phenomenon due to which there is an induced current in one coil due to the current in a neighboring coil is?
Mutual induction
Steady current
Electromagnetism
Self induction
22.
A 10-turn ideal solenoid has an inductance of 4.0 mH. To generate an emf of 2.0 V the current should change at a rate of:
0 A/s
0.5 A/s
50 A/s
250 A/s
500 A/s
23.
How large a current must flow through a 1.2 H inductance so that the energy stored is 393 J?
1.17 A
2.31 A
25.6 A
44.2 A
107.1 A
24.
The production of electric current by a changing magnetic field is called ____________________________________.
induced current
electromotive force
electromagnetic induction
internal resistance
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