Physical Science

Chapter 7: Electricity

Section 2 Self-Check Quiz-Eng.

1.
Electric charges flow from __________.
A)low-voltage areas to high-voltage areas
B)insulators to conductors
C)low-resistance areas to high-resistance areas
D)high-voltage areas to low-voltage areas
2.
__________ is the push that causes charges to move.
A)Induction
B)Static
C)Resistance
D)Voltage difference
3.
A(n) __________ is a closed, conducting path.
A)current
B)circuit
C)resistor
D)ampere
4.
__________ is the tendency for a material to oppose the flow of electrons.
A)Resistance
B)Induction
C)Transistance
D)Conduction
5.
Which of the following actions increases the resistance of a wire?
A)making it shorter
B)making it thicker
C)decreasing the temperature
D)making it longer
6.
According to Ohm's law, as the resistance in a circuit __________, the current __________.
A)decreases, decreases
B)increases, decreases
C)increases, remains constant
D)increases, doubles
7.
Electric current in a circuit is measured in _________.
A)volts
B)watts
C)ohms
D)amperes
8.
What is the current in a circuit if the voltage difference is 15 V and resistance is 15 W?
A)0.0 A
B)30 A
C)1.0 A
D)225 A
9.
Calculate the resistance in a circuit if the current flowing is 12 A and the voltage difference is 480 V.
A)4 Ω
B)40 A
C)40 Ω
D)4.0 A
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