Pa Help Po Please.
1. Which of the following is produced between pushing and pulling magnetized coils?
A. electrons B. force C. magnetic field D. movement
2. What is created when a magnet moves through a coil of wires?
A. electromagnet C. electric current
B. electromagnetism D. solenoid
3. What happens if you hold the south poles of one magnet close to the north
pole of another magnet?
A. Nothing will happen. C. They will repel each other.
B. They will be very hot. D. They will attract each other.
4. How does a galvanometer make use of the relationship between electric
current and magnetic field? It is used to _______________.
A. detect current C. change AC to DC
B. generate electricity D. converts current into mechanical energy
5. What uses an electromagnet to measure electric current?
A. amperes B anemometer C. galvanometer D. thermometer
6. Which of the following materials do NOT have magnets on it?
A. buzzers B. doorbells C. speakers D. tires
7. Which is an attraction or repulsion created by spinning electric charges?
A. electric generator C. solenoid
B. electromagnetism D. magnetic force
8. What happens if you hold the north poles of two different magnets close to
each other?
A. Nothing will happen. C. They will repel each other.
B. They will be very hot. D. They will attract each other.
9. How do you weaken the strength of an electromagnet?
A. heating it C. lessen the turning coils of wire
B. banging it on a table D. increase the turning coils of wire
10. Why we need to turn more coils of wire to an electromagnet? To __________.
A. make it stronger C. remain its strength
B. weaken the wire D. decrease the length of the wire