"U" Shaped Electromagnet

Q.

The strength of an electromagnet is

1. directly proportional to the number of turns per unit length of the coil.

2. inversely proportional to the number of turns per unit length of the coil.

3. inversely proportional to the amount of current flowing through the coil.

Q.

State whether the following statement is true or false.

The strength of an electromagnet depends on the amount of current.

1. True
2. False

Q.

How many poles are there actually in an electromagnet?

Q.

We can make very strong magnets by

1. The single touch method.

2. Divided touch method.

3. Using electric currents.

4. Using two or three magnets.