Course home

1 Energy

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Question 9

An underwater ocean research probe is powered by a small thermoelectric generator (TEG) that drives a sonar transmitter.

State the equation that links current ( $I$ ), potential difference ( $V$ ), and power ( $P$ ).

[1]

When the thermoelectric generator is active, a potential difference of $V8.0\text{ V}$ is maintained across its terminals, producing an electrical power output of $W5.6\text{ W}$ .

Calculate the current generated.

[2]

State the equation that links efficiency, total power input, and useful power output.

[1]

The electrical power from the generator is used to run the sonar transmitter. The transmitter has a total power input of $W2.5\text{ W}$ and operates at an efficiency of $0.72$ .

Calculate the useful acoustic power output of the transmitter.

[2]

Markscheme

1 Energy Questions

GCSE
Physics
1 Energy

1 Energy

Question bank

1 Energy

Easy Medium

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Question 9

An underwater ocean research probe is powered by a small thermoelectric generator (TEG) that drives a sonar transmitter.

State the equation that links current ( $I$ ), potential difference ( $V$ ), and power ( $P$ ).

[1]

When the thermoelectric generator is active, a potential difference of $V8.0\text{ V}$ is maintained across its terminals, producing an electrical power output of $W5.6\text{ W}$ .

Calculate the current generated.

[2]

State the equation that links efficiency, total power input, and useful power output.

[1]

The electrical power from the generator is used to run the sonar transmitter. The transmitter has a total power input of $W2.5\text{ W}$ and operates at an efficiency of $0.72$ .

Calculate the useful acoustic power output of the transmitter.

[2]

Markscheme

1 Energy Questions

GCSE
Physics
1 Energy