MCQ Eddy Currents, Class 12 Physics

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Foucault Currents are also called

Eddy Currents

Direct Currents

Induced Current

Both eddy and induced current

Your comments:

Question 1 of 10

2. Which of the following will not increase the size and effect of eddy current?

Low resistivity materials

Strong magnetic field

Thicker material

Thinner material

Your comments:

Question 2 of 10

3. Why is the iron core of a transformer made laminated instead of being in one solid piece?

To reduce the magnetic field link losses

To reduce the loss due to heating of coils

To reduce the hysterisis losses

To reduce the losses due to eddy currents.

Your comments:

Question 3 of 10

4. Eddy currents have negative effects. Because they produce

Harmful radiation

Heating and damping

Damping only

Heating only

Your comments:

Question 4 of 10

5. Select the expression for eddy current and which rule helps in finding its direction?

A

B

C

D

Your comments:

Question 5 of 10

6. A circular coil of area 200 cm² and 25 turns rotates about its vertical diameter with an angular speed of 20 ms^-1 in a uniform horizontal magnetic field of magnitude 0.05 T. The maximum voltage induced in the coil is

0.5 V

1.5 V

2.5 V

2.0 V

Your comments:

Question 6 of 10

7. In electromagnetic induction, line integral of induced field E around a close path is __________, induced electric field is ___________.

Zero, Non Conservative

Non zero, Conservative

Zero, Conservative

Non zero, Non Conservative

Your comments:

Question 7 of 10

8. In the dead beat galvanometer, the coil is wound on a frame made of:

good conductor

non magnetic material

bad conductor

magnetic material

Your comments:

Question 8 of 10

9. Eddy currents can be induced in

Metal Blocks

Wires

Both metal blocks and wires

Insulators

Your comments:

Question 9 of 10

10. Eddy currents do not cause:

sparking

heating

loss of energy

damping

Your comments:

Question 10 of 10

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