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Edexcel | Physics WPH0 | W 12 6 1 | 1 hour 30 minutes

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Q1
Q2
Q3
Q4

3

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A student wants to determine the specific heat capacity of aluminium. She heats a block

of aluminium by supplying electrical energy to a heater that is inserted into the block as

shown.

3

(a)

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1 Mark

Draw the electrical circuit she should use.

Circuit showing power supply unit (psu), heater, ammeter and voltmeter in

parallel with heater

3

(b)

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6 Mark s

She writes the following plan

Write an improved plan that includes details of the method to be used and any

precautions needed to produce an accurate value for the specific heat capacity of

aluminium.

Max 6

• Start below and finish above room temperature

• Measure the p.d. (voltage) and current

• at start and at the end and average

• Switch off current and measure highest temperature reached

• Insulate block

• Measure mass of block (& heater)

• (Put oil into holes to help) Good thermal contact between heater,

thermometer & block

• Use stopclock to measure time of current flow

• Calculate (energy) by multiplying voltage by current by time

• Draws appropriate graph and finds gradient

• Uses gradient correctly to find c

Q1
Q2
Q3
Q4

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