Q.1
What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?
  • 1.8 amps
  • 45 amps
  • 0.022 amps
  • 8.8 amps
Q.2
The force or push that causes electric charges to move is called ______ .
  • resistance
  • voltage difference
  • static electricity
  • current
Q.3
Electric charges always flow from _____ areas to _____ areas.
  • positive; negative
  • negative; positive
  • neutral; negative
  • neutral; positive
Q.4
A material through which electrons do NOT flow easily is a(n) ______.
  • insulator
  • conductor
  • fuse
  • circuit breaker
Q.5
Which of the following statements about electric charge is true?
  • Objects must be touching on another to exert electrical force.
  • Electrical forces act at a distance.
  • Air cannot conduct electricity; it is conducted only by solid materials.
  • Opposite electric charges always repel one another.
Q.6
Mr. Robinson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?
  • plastic plate
  • silver spoon
  • copper wire
  • gold necklace
Q.7
Which two areas of physical science are closely related to the development of electric motors and generators?
  • sound and light
  • electricity and sound
  • light and magnetism
  • electricity and magnetism
Q.8
Which of the following will decrease the strength of the magnetic field around a wire?
  • increasing the current flowing through the wire
  • using less loops around the iron core
  • flipping the direction of the current flowing through the wire
  • using a larger iron core
Q.9
Silver has a resistance of 0.ohms. What voltage would produce a current ofamps?
  • 1.98 V
  • 0.000198 V
  • 5050 V
  • 100.0198 V
Q.10
This contains a piece of metal that melts if it gets too hot in order to open a circuit.
  • conductor
  • insulator
  • fuse
  • circuit breaker
Q.11
The function of a generator is to change ______
  • chemical energy to electrical energy
  • electrical energy to chemical energy
  • mechanical energy to electrical energy
  • electrical energy to mechanical energy
Q.12
This exerts a force that causes other electric charges to move.
  • electrical poles
  • electrical fields
  • insulators
  • conductors
Q.13
Which circuit below contains the greatest voltage?
  • A circuit with a current of 20 amps and a resistance of 16 ohms
  • A circuit with a current of 10 amps and a resistance of 10 ohms
  • A circuit with a current of 25 amps and a resistance of 16 ohms
  • A circuit with a current of 20 amps and a resistance of 10 ohms
Q.14
What would happen if in a circuit, the resistance increases but the voltage stays the same?
  • The current would decrease
  • The current would increase
  • The voltage would decrease
  • The voltage would increase
Q.15
How do you calculate voltage?
  • Current X Resistance
  • Resistance ÷ Current
  • Current ÷ Resistance
  • Measure it with a ruler
0 h : 0 m : 1 s