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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Current Electricity

Olympiad workbook · NSEP · Current Electricity

What amount of heat will be generated in a coil of resistance...

What amount of heat will be generated in a coil of resistance

R(\mathrm{ohm})

due to a total charge

Q

(coulomb) passing through it if the current in the coil decreases down to zero halving its value every

\Delta \mathrm{t}

second?

Options

A $\frac{1}{2} \frac{\mathrm{Q}^2 \mathrm{R}}{\Delta \mathrm{t}}$
B $\frac{\mathrm{Q}^2 \mathrm{R}}{\Delta \mathrm{t}} \ln 2$
C $\frac{1}{2} \frac{\mathrm{Q}^2 \mathrm{R}}{\Delta \mathrm{t}} \ln 2$
D $\frac{1}{4} \frac{\mathrm{Q}^2 \mathrm{R}}{\Delta \mathrm{t}}$

Correct answer

C. $\frac{1}{2} \frac{\mathrm{Q}^2 \mathrm{R}}{\Delta \mathrm{t}} \ln 2$

Step-by-step solution

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