Engineering summer work

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https://youtu.be/uXr4lXYjXuU

Watch video to 9:40

Rearrange the equation V=IR in terms of R

R=V/I

R=IV

R=I/V

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An increase in resistance will cause current to

Increase

Decrease

Stay the same

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What is the current when resistance is 18Ω and voltage is 12V?

216A

0.66A

1.5A

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Which equation would you use to work out power from current and resistance?

P=VI

P=I²R

P=IR

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Calculate the power when a current of 10A flows and the voltage is 3V

3.33W

30W

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Calculate the power when there is a resistance of 100Ω and a current of 12A

1200W

14,400W

8.33W

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What is the total resistance in this circuit?

Use the image above

500Ω

450Ω

450A

500A

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If the voltage of the battery = 12V

V1 = 4V

V2 = 3.5V

What is V3?

See image above

12V

15V

4.5V

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If resistors are in parallel the total resistance is ________ the individual resistors.

less than

more than

the same as

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What happens to current in a parallel circuit?

It is the same at every point

Each loop will have the same current

The current will split at junctions

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If voltage of a supply is increased and the resistance stays the same the current will?

In a parallel circuit the voltage of each loop is equal to the voltage of the _________ ?

For a string of fairy lights, which type of circuit would be most appropriate?

Power is the amount of energy that is transferred every __________

Resistance is ______________________________________________

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