Cỡ chữ
bảng tínhEnergy Test
Total câu hỏi: 11
Worksheet time: 3hrs 45mins
A student exploring magnets discovered that when she touched a nail to a magnet, the nail picked up a paper clip and the paper clip picked up a screw.
Explain to this student what is happening:
___________ allows the energy to flow.
A conductor.
An insulator
A magnet
___________ stops the flow of electricity.
A conductor
An insulator
A magnet
To complete a circuit the switch must be
unattached
open
closed
Magnets have a north and south ________
pole
shape
color
region
What happens when two north poles of a magnet are placed together?
they attract
they repel
they cancel each other out
the strength of the magnet is doubled
All metals are attracted to magnets.
True
False
The space around a magnet where the force of a magnet can attract best is called _______.
magnetism
horseshoe magnet
bar magnet
magnetic field
To make this electromagnet stronger you could:
use less wire
have fewer wire coils around the nail
use a plastic core
have more wire coils around the nail
What supplies the energy in an electric circuit?
battery
light bulb
wire
conductor
You’ve been asked to trouble-shoot these circuit designs to make sure that they will work before they are presented to the class to put together. Which circuits will work as designed? Which will not work as designed?
