Physics, 19.01.2021 17:40 kleathers97
Use the following formulae to solve these questions. Show your workings and state
units for all answers.
1. An electric lamp transfers 500 J in 5 s. What is its power?
2. A device transfers 100 J in 5 s. What is its power?
3. How much energy is transferred by a 5 W lamp in 2 minutes?
4. Which is the greatest power rating? 300W, 0.3kW or 3000W
5. What is the power of a lamp with a current of 5A and potential difference of
1.5V?
Answers: 3
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Use the following formulae to solve these questions. Show your workings and state
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