Available Answers

1. 1.

   Match the following.

   Column A	Column B
   i. Generator	a. cylindrical coil of wire
   ii. Motor	b. steps upor steps down voltage
   iii. Transformer	c. produces electric current
   iv. Ampere's law	d. direction of magnetic field
   v. Solenoid	e. converts electrical to mechanical
   vi. Right-hand thumb rule	f. direction of deflection of magnetic needle
   	g. weak repulsion

2. 2.

   State whether the statements are true or false and correct the false statements.

   1. The function of the magnetic compass shows that there is no magnetic field around it.
   2. The outer casing of a magnetic compass should be made of iron or steel.
   3. Like poles of a magnetic attract each other whereas unlike poles repel.
   4. The two poles of a magnetic can never be separated.
   5. Ampere's swimming rule says that the direction of swimmer's right hand gives the direction of movement of the north pole.
3. 3.

   Correlate the following.

   1. Right-hand thumb rule: Direction of magnetic field :: __________ : Deflection of north pole
   2. Motor : Mechanical energy :: Generator : ____________
   3. Electromagnets : Electric bell :: _________ : Magnetic compass
   4. Oersted : Electromagnetism :: __________ : Electromagnetic induction
4. 4.

   Write any three properties of magnets.

5. 5.

   What is magnetic field?

6. 6.

   Give any two properties of magnetic lines of force.