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Electricity Review

Authored by Leah Baiton

Physics, Science

9th Grade

NGSS covered

Used 9+ times

Electricity Review
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30 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the energy released from a battery in a hand vacuum cleaner that was switched on for 45 s. The voltage drop was 6 V and the current was 0.30 A.

35 J

81 J

42 J

82 W

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the power rating of an electric toaster that uses 210 000 J while toasting bread for 140 s

1500 J

1200 W

1500 W

1300 J

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the percent efficiency of an electric motor that uses 15 000 J of energy to produce

11 500 J of useful movement.

76.6%

82.3%

75.4%

23.3%

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the cost of operating a heater of 1.75kw for 20 hours at rate of $0.13 per kwh?

$6.75

$4.55

$53.43

$45.53

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How do you calculate voltage?

Current X Resistance
Resistance ÷ Current
Current ÷ Resistance
Measure it with a ruler

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How do you calculate resistance?

Voltage X Current
Current ÷ Voltage
Voltage ÷ Current
Current X Amps

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

5V
0.2V
20V
200V

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