Home GCSE OCR Gateway Physics 2.1 Current, Potential Difference & Resistance The table shows the current and potential difference for four different lamps
The table shows the current and potential difference for four different lamps - OCR Gateway - GCSE Physics - Question 11 - 2020 - Paper 2 Question 11
View full question The table shows the current and potential difference for four different lamps.
Which lamp has the highest power?
Use the equation: power = potential difference × c... show full transcript
View marking scheme Worked Solution & Example Answer:The table shows the current and potential difference for four different lamps - OCR Gateway - GCSE Physics - Question 11 - 2020 - Paper 2
Calculate power for lamp A Only available for registered users.
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For lamp A:
e x t P o w e r = e x t P o t e n t i a l d i f f e r e n c e i m e s e x t C u r r e n t e x t P o w e r = 5 i m e s 2 = 10 e x t W ext{Power} = ext{Potential difference} imes ext{Current} \
ext{Power} = 5 imes 2 = 10 ext{ W} e x t P o w er = e x t P o t e n t ia l d i ff ere n ce im ese x t C u rre n t e x t P o w er = 5 im es 2 = 10 e x t W
Calculate power for lamp B Only available for registered users.
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For lamp B:
e x t P o w e r = e x t P o t e n t i a l d i f f e r e n c e i m e s e x t C u r r e n t e x t P o w e r = 4 i m e s 3 = 12 e x t W ext{Power} = ext{Potential difference} imes ext{Current} \
ext{Power} = 4 imes 3 = 12 ext{ W} e x t P o w er = e x t P o t e n t ia l d i ff ere n ce im ese x t C u rre n t e x t P o w er = 4 im es 3 = 12 e x t W
Calculate power for lamp C Only available for registered users.
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For lamp C:
e x t P o w e r = e x t P o t e n t i a l d i f f e r e n c e i m e s e x t C u r r e n t e x t P o w e r = 2 i m e s 4 = 8 e x t W ext{Power} = ext{Potential difference} imes ext{Current} \
ext{Power} = 2 imes 4 = 8 ext{ W} e x t P o w er = e x t P o t e n t ia l d i ff ere n ce im ese x t C u rre n t e x t P o w er = 2 im es 4 = 8 e x t W
Calculate power for lamp D Only available for registered users.
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For lamp D:
e x t P o w e r = e x t P o t e n t i a l d i f f e r e n c e i m e s e x t C u r r e n t e x t P o w e r = 1 i m e s 5 = 5 e x t W ext{Power} = ext{Potential difference} imes ext{Current} \
ext{Power} = 1 imes 5 = 5 ext{ W} e x t P o w er = e x t P o t e n t ia l d i ff ere n ce im ese x t C u rre n t e x t P o w er = 1 im es 5 = 5 e x t W
Determine which lamp has the highest power Only available for registered users.
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Comparing the calculated powers:
Lamp A: 10 W
Lamp B: 12 W
Lamp C: 8 W
Lamp D: 5 W
The lamp with the highest power is lamp B, with a power of 12 W.
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