In a circuit with one bulb, what will happen to the brightness of the bulb if more batteries are added in series?
A The bulb will blow out immediately because there is too much current
B The bulb stays the same brightness because the bulb is the same
C The bulb becomes brighter because more electric current flows through it
D The bulb becomes dimmer because the batteries are connected wrongly
SAMPLE 2
Copper wire is used in electric circuits because it is a good conductor of electricity. What about the plastic coating on the wire?
A It is a conductor that helps the current flow better
B It is a magnetic material that attracts the current
C It is an insulator that prevents electric current from leaking out
D It is a weak conductor that slows down the current
SAMPLE 3
A student sets up a circuit with a battery, a bulb, and copper wires. The bulb lights up. Which part of the circuit allows electric current to flow through it?
A The switch
B The bulb
C The battery
D The copper wires
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