EVALUATION
Quiz by DANICA LLOYD VALENDEZ
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- Q1
Which of the following are components is NOT an electromagnet?
wire
plastic cap
nail
dry cell
20s - Q2
Which statement is TRUE of an electromagnet?
An increase in the number of turns of wires or coils makes an electromagnet becomes stronger.
An iron core is not needed to make an electromagnet.
A small dry cell makes a strong electromagnet.
An electromagnet is a permanent magnet.
20s - Q3
Which of the following is NOT a factor affecting the strength of an electromagnet?
plastic caps
core materials
number and diameter of dry cells (battery)
Number of turns or coils
20s - Q4
What will happen when a magnet is placed near a piece of iron?
The piece of iron will go through a physical change.
None of the above.
The piece of iron will go through a chemical change.
The piece of iron will be attracted to the magnet.
20s - Q5
Welina has these materials for her electromagnet: dry cell (battery), nail, wire. She wants to make a strong electromagnet. What will she do?
Use a small dry cell (battery)
Decrease the number of turns or coils of the wire
Use a small nail as a core
Use a bigger dry cell (battery)
20s - Q6
An electric motor uses an electromagnet to change ________.
magnetic fields in the motor
mechanical energy to electrical energy
electrical energy to mechanical energy
magnetic poles in the motor
20s - Q7
To strengthen an electromagnet, _______.
decrease the voltage
increase the number of turns in a coil
put a non-magnetic substance in the coil
all of the above
20s - Q8
Which of these increase the strength of electromagnets?
C. I and II
I and III
II and III
D. III and IV
30s - Q9
An electromagnet is a ________________ magnet.
temporary
parallel
series
permanent
20s - Q10
What happens when you disconnect an electromagnet from a battery?
Nothing will happen.
It will stop from attracting metals.
It will explode.
It will continue from attracting non-metals
15s
