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MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction
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Question # 1
Which of the following quantities remain constant in step up transformer?
Question # 2
In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:
Question # 3
Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:
Question # 4
Lenz's law is the consequence of
Question # 5
Transformer is used to
Question # 6
The induced current in the loop can be increased by:
Question # 7
The induced current in a conductor depends upon:
Question # 8
An induced current can be produced by:
Question # 9
The current produced by moving a loop of wire across a magnetic field is called
Question # 10
An
induced current can be produced by:
Question # 11
Self inducede e.m.f. is also called
Question # 12
Motional emf is called motional:
Question # 13
Referring to above figure, due to change in current in the coil P, the change in magnetic flux
Question # 14
Lens's law deals with the
Question # 15
Split rings act as
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Chapter 15 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The SI unit of magnetic induction is |
A. Weber
B. Weber/meter
C. Henry
D. Tesla
|
| 2 | Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V: |
A. 45 V
B. 15 V
C. 90 V
D. 300 V
|
| 3 | When a conductor moved with its length parallel to the lines of magnetic fled: |
A. An emf is induced across its ends
B. Emf induced is similar to that of a battery
C. Emf passes through the conductor
D. Both A and B
|
| 4 | Back emf is produced due to |
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law
|
| 5 | Which of the following quantities remain constant in step up transformer? |
A. Current
B. Voltage
C. Power
D. Heat
|
| 6 | The motional e.m.f depends upon the |
A. Length of a conductor
B. Strength of a magnet
C. Speed of the conductor
D. All of the above
|
| 7 | Referring to above figure, due to change in current in the coil P, the change in magnetic flux: |
A. Is associated with coil P
B. Is associated with coil S
C. Causes an induced current is coil S
D. All of these
|
| 8 | Referring to above figure, due to change in current in the coil P, the change in magnetic flux |
A. Is associated with coil P
B. Is associated with coil S
C. Causes and induced current in coil S
D. All of these
|
| 9 | The work is stored in the inductor as |
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
|
| 10 | A.C. can be measure with the help of |
A. Nuclear effect
B. Magnetic effect
C. Chemical effect
D. Heating effect
|
Test Questions