1.
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

2.
Strength of an electromagnet can be increased by

3.
Magnetism of a magnet can be destroyed by

4.
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

5.
Which of the following is a vector quantity?

6.
One maxwell is equal to

7.
Temporary magnets are used in

8.
When an iron piece is placed in a magnetic field

9.
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m?

10.
A magnetic field exists around

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