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15th Chapter

12th Class Physics Chapter 15 Test

Here you can prepare 12th Class Physics Chapter 15 Electromagnetic Induction Test. Click the button for 100% free full practice test.

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

This online test contains MCQs about following topics:

- Induced EMF and Induced Current
- Motional EMF
- Faraday's Law and Induced EMF
- Lenz's Law and Direction of Induced EMF
- Mutual Induction
- Self Induction
- Energy Stored in an Inductor
- Alternating Current Generator
- D.C. Generator
- Back Motor Effect in Generator
- D.C. Motor
- Back EMF Effect in Motors
- Transformer

Ics Part 2 Physics Chapter 15 Test
ic

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

Sr. # Questions Answers Choice
1 If magnetic field is doubled then magnetic energy density becomes.
  • A. Four times
  • B. Two times
  • C. Three times
  • D. Six times
2 When back emf in motor is zero, it draws.
  • A. Zero current
  • B. Minimum current
  • C. Maximum current
  • D. Steady current
3 A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.
  • A. 0.1 J
  • B. 10 J
  • C. 100 J
  • D. 1000 J
4 If a step up transformer were 100% efficient the primary and secondary winging's would have the same.
  • A. Current
  • B. Power
  • C. Voltage
  • D. Direction of winding
5 The direction of induced current is always so as to oppose the change which causes the current is:
  • A. Faraday's law
  • B. Lenz's  law
  • C. Ohm's law
  • D. Kirchhoff's 1st rule
6 The emf induced by the motion of a conductor across a magnetic field is called:
  • A. Motional emf
  • B. Rotational emf
  • C. Induced emf
  • D. All of above
7 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
8 Eddy current is one cause energy loss in
  • A. A.C. generator
  • B. Transformer
  • C. D.C. motor
  • D. D.C. generator
9 The induced emf in a coil is proportional to:
  • A. Magnetic flux through the coil
  • B. Rate of change of Magnetic flux through the coil
  • C. Area of the coil
  • D. Product of magnetic flux flux and area of the coil
10 The magnitude of motional emf is given by
  • A.
  • B.
  • C.
  • D.

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