JAMB Physics 2015 Objective — Question 14
Question 14 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2015 Objective paper, with the correct answer and a full explanation.
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A block of aluminium of mass m is heated electrically by a 25W heater. If the temperature rises by 10°C in 5 minutes, calculate the heat capacity of the aluminium.
- A. 750JK⁻¹Correct
- B. 1250JK⁻¹
- C. 125JK⁻¹
- D. 50JK⁻¹
Explanation
Electrical energy = 25×5×60 = 7500J. Heat capacity C = 7500/10 = 750JK⁻¹.
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