Magnetic Effect...

Match the following with correct response.

1. S.I unit of magnetic field
2. Magnetic field inside the solenoid
3. Compass needle
4. Solenoid

1. Small bar magnet capable of rotating freely
2. Tesla
3. Temporary magnet
4. Uniform

Match the following with correct response.

Match the following with correct response.
(1) Like poles
(2) Unlike poles
(3) Live wire
(4) Neutral wire

(A) Attract
(B) Black
(C) Red
(D) Repel

The magnetic field at a point due to current carrying conductor is directly proportional to
A. Current flowing through the conductor
B. Distance of the conductor
C. Resistance of the conductor

Which of the following is correct?
A. A field lines forms a closed loop.
B. Neutral wire is always at zero voltage.
C. Heat loss in DC is less than AC.
D. Electric fuse is a current generating device.

Which of following statement is not correct about electric fuse
A. It is always connected in live wire
B. It is always connected in the end of the circuit
C. Thinner the fuse wire, greater is its current capacity
D. Its current capacity must be less than the maximum current

When the main switch of the house circuit is put off, it disconnects the _________

Permanent magnets are made of
A. Steel
B. Alnico
C. Nipermag
D. Tungsten

Which one of the following is correct-

1. Fuse wire is an alloy of tin and lead
2. Switch is always connected to live wire
3. Alternate current is unidirectional
4. Higher is the value of current flow, weaker is the magnetic field

Magnetic field lines determine