09 Power

Poll

If we increase the tap size what would happen in relation to power

• More power

• Less power

Reorder

Organize these options into power rating lowest to highest

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Math Response

A Heater takes 20a and runs on 230v how much power does it use

Type answer here

Correct Answer: 4600

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Math Response

A Motor uses 2.5Kw of power to run and need 5a to operate what voltage is it operating at?

Type answer here

Correct Answer: 500

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Match

Match the following item to the most appropriate fuse size

3a Fuse

10a Fuse

13a

5a

• 3a Fuse

• 10a Fuse

• 13a

• 5a

Home

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Copy link

​https://www.ofgem.gov.uk/energy-price-cap

​https://www.ofgem.gov.uk/energy-price-cap

Math Response

A lamp is turned on for a period of 3 hours 45 minutes, It takes a current of 0.5a when connected to a 80v Supply.

1. Calculate the total energy used in joules

Type answer here

Correct Answer: 528000

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Math Response

A lamp is turned on for a period of 3 hours 45 minutes, It takes a current of 0.5a when connected to a 80v Supply

2. The amount of power used in 1 hour

Type answer here

Correct Answer: 0.04

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Math Response

A lamp is turned on for a period of 3 hours 45 minutes, It takes a current of 0.5a when connected to a 80v Supply

3. If it cost £0.35 per unit of Electricity how much would it cost to run the lamp?

Type answer here

Correct Answer: 0.05

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