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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

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

Sr. # Questions Answers Choice
1 Self inductance of a long solenoid is given by
• A.
• B.
• C.
• D. None of the above
2 the core of transformer is laminated so reduce.
• A. Magnetic loss
• B. Hysteresis loss
• C. Eddy current loss
• D. Electric loss
3 The mutual inductance of the coils depends upon.
• A. Stiffness of the coils
• B. Density of coils
• C. Material of coils
• D. Geometry of the coils
4 The motional emf developed in a conduction depends upon.
• A. Length
• B. Orientation
• C. Magnetic field
• D. All of the above
5 The device in which induced emf is statically induced emf is:
• A. Transforms
• B. AC generator
• C. Alevator
• D. Dynamo
6 When a motor is over loaded then the magnitude of back emf.
• A. Increases
• B. Decreases
• C. Remain constant
• D. Zero
7 Commutator was invented in
• A. 1834
• B. 1820
• C. 1840
• D. 1835
8 Which of the following quantities remain constant in step up transformer?
• A. Current
• B. Voltage
• C. Power
• D. Heat
9 If the coil is wound on iron core, the flux through it.
• A. Decreases
• B. Becomes zero
• C. Increases
• D. Remains constant
10 Electromagnetic induction is exactly according to law of:
• A. Momentum
• B. Charge
• C. Energy
• D. Mass

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