Fun Quiz - End of Chapter 5

Which of the following substances best conducts electricity?

If each of the following were used as the core of an electromagnet, which would have the least effect on the strength of the magnetic field?

Which of the following electromagnets produces the strongest magnetic field?

If you are making an electromagnet, which combination will produce the strongest magnetic field?

1. A solenoid with 100 turns

2. A solenoid with 200 turns

3. A current of 5 amperes

4. A current of 10 amperes

David dried the family's laundry in an electric clothes dryer. The rating plate on the dryer gives the following information :

240 V, 60 Hz, 5000 W

David used the dryer for 4 hours. The average rate of electricity is $ 0.04 per kWh.

How much did it cost him to dry the clothes?

The four diagrams represent electromagnets connected to the terminals of a battery.

In which diagrams are the magnetic poles of the electromagnet correctly indicated?

Magnetic lines of force are shown in the diagrams.

Which of the diagrams is INCORRECT?