1. How to make electromagnet?
a. Wrap the copper wire in the nail and connect it in the positive and negative part of the dry cell battery
b. Connect the nail in the positive and negative part of the dry cell battery
c. Connect the copper wire in the dry cell battery.
d. Wrap the nylon cord in the nail and connect it in the positive and negative part of the dry cell battery

2. It is a complete path that allows the free flow of electricity.
a circuit
b. parallel circuit
c. open circuit
d series circuit

3. How can you make electro magnet stronger?
a. Smaller nail, more coil and one dry cell.
c. More coil, smaller nail and one dry cell
b. More coil, bigger nail and two dry cell.
d. Less coil, bigger nail and one dry cell.

4. Interruption in the path of current to flow has not been broken or disrupted
a. parallel circuit
b. closed circuit
c. open circuit
d series circuit

5. What is the difference between electromagnet from magnet?
a. The ability to change the weakness of its magnetic field.
b. The ability to lift things.
c. The ability to change the strength of its magnetic field.
d. No difference​