2nd Year Physics Chapter 15 Online MCQ Test for 12th Class Physics Chapter 15 (Electromagnetic Induction)

ICS Part 2 Physics
Chapter 15 Test

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Physics ICS Part 2 Chapter 15 Online MCQ's Test

00:00
Question # 1

The jerks in D.C. motor are created by the use of.

Question # 2

DC generator by william Sturgeon in:

Question # 3

One henry is equal to

Question # 4

Output of D.C. motor is

Question # 5

Eddy current is one cause energy loss in

Question # 6

If magnetic field is doubled then magnetic energy density becomes.

Question # 7

The unit of induced emf is

Question # 8

If speed of rotation of a generator is doubled the output voltage will be.

Question # 9

The winding of the electromagnet in motor are usually called.

Question # 10

With the speed of motor, magnitude of back emf

Question # 11

In self induction A coil is connected in__________ with battery and a rheostat.

Question # 12

When a motor is over loaded then the magnitude of back emf.

Question # 13

Self inductance of a long solenoid is given by

Question # 14

For step down transformer

Question # 15

Lenz's law is a consequence of the law of conservation of

Question # 16

Induced emf in A.C. generator can be increased by

Question # 17

EMF is induced due to change in

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ICS Part 2 Physics Chapter 15 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The mutual inductance between two coils depends upon their
A. Size
B. Core material
C. Size, core material and separation
D. Separation
2 The movement of conductor in magnetic field produces electrical current was discovered in:
A. 1931
B. 1731
C. 1842
D. 1831
3 When the back emf in a current is zero, it draws
A. Zero current
B. Maximum current
C. Minimum current
D. Steady average current
4 If 10 A current passes through 100 mH inductor, then energy stored is.
A. 100 J
B. 5 J
C. 20 J
D. Zero
5 In a coil current change from 2 to 4 A in .05 s . If the average induced emf is 8 V then coefficient of self-inductance is:
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
6 Efficiency of transformer does not affected by
A. Input voltage
B. Core of transformer
C. Insulation between sheet
D. Resistance of coils
7 The current induced can be increased by:
A. Using a stronger magnetic field
B. Moving the loop faster
C. Replacing the loop bay coi of many turns
D. All of above
8 B2/2p is the expression of.
A. Lenz's law
B. Magnetic energy
C. Magnetic energy density
D. Back emf
9 A step up transformer is used 120 V line to provide 240 V. If primary coil has 100 turns the number of turns is secondary is.
A. 50
B. 100
C. 150
D. 200
10 Commutator was invented in
A. 1834
B. 1820
C. 1840
D. 1835

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