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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 is most suitable as the core of transformer
Question # 2
In magnet-coil experiment, emf can be produced by:
Question # 3
The phenomenon of generation of induced emf is called
Question # 4
In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:
Question # 5
Referring to above figure, current in the coil P grows from zero to its maximum value:
Question # 6
Referring to above figure, current in coil P falls from its maximum value to zero:
Question # 7
In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:
Question # 8
The motional e.m.f depends upon the
Question # 9
A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
Question # 10
The device in which induced emf is statically induced emf is:
Question # 11
What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10-2Wb, and change in current is 0.01 A?
Question # 12
The rate change of area expressed is expressed in:
Question # 13
When there is no relative motion between the magnet and coil, the galvanometer indicated
Question # 14
A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when
Question # 15
The work is stored in the inductor as
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ECAT Physics Chapter 15 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The Phenomenon of generation of induced emf is called |
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
|
| 2 | Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current: |
A. Of same magnitude in the same direction
B. Of different magnitude in the same direction
C. Of same magnitude but in opposite direction
D. Of different magnitude in the opposite direction
|
| 3 | The phenomenon of generation of induced emf is called: |
A. Electrostatic induced
B. Magnetic induced
C. Electromagnetic induced
D. Electric induced
|
| 4 | Micheal Faraday and joseph Henry belong respectively to: |
A. USA and England
B. England and France
C. England and USA
D. USA and France
|
| 5 | In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is: |
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
|
| 6 |
The magnitude of induced emf depends upon the: |
A. Rate of decrease of magnetic field
B. Rate of change of magnetic field
C. Rate of increase of magnetic flux
D. Constancy of magnetic field
|
| 7 | The direction of induced current is always so as to oppose the cause which produces it. This is |
A. Lenz's law
B. Ampere's law
C. Faraday's law
D. Coulomb's law
|
| 8 | Referring to above figure, current in the coil P grows from zero to its maximum value: |
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. All of above
|
| 9 | Eddy current is produced when: |
A. A metal is kept in varying magnetic field
B. A metal is kept in steady magnetic field
C. A circular coil is placed in a steady magnetic field
D. A current is passed through a circular coil
|
| 10 | The SI unit of magnetic induction is |
A. Weber
B. Weber/meter
C. Henry
D. Tesla
|
Test Questions