Electricity - Power calculations

Electricity - Power calculations

University

25 Qs

quiz-placeholder

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Electricity - Power calculations

Electricity - Power calculations

Assessment

Quiz

Physics

University

Medium

Created by

Stevan Simonovic

Used 4+ times

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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Calculate the power generated as a 20 A current flows through a 10Ω resistor?

2 W

200 W

4000 W

400 W

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How much power can be generated from a 20A current flow because of a 1 kV battery?

20 W

20000 W

0.05 W

0.5 W

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the resistance of a 75 W bulb with 5 A of current flowing through it?

3 Ω

15 Ω

375 Ω

Resistance is futile!

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the power of a 20V bulb with 5A through it?
100W
100V
6.3W
6.3A

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the resistance through a 700 mV bulb with a power of 1 kW?

7 Ω

4.9 x 10-4 Ω

7 x 10-4Ω

70 Ω

6.

FILL IN THE BLANK QUESTION

3 mins • 1 pt

Calculate the current through a microwave oven that has a power rating of 800W and a potential difference of 230V.

Give your answer to 3 significant figures.

7.

FILL IN THE BLANK QUESTION

3 mins • 1 pt

calculate the power of a kettle that has a potential difference of 230 V and a current 10 A.

Don't include commas or spaces in your answer

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