David Sang and Graham Jones Solutions for Chapter: Electric Current, Potential Difference and Resistance, Exercise 10: Questions

A $12 \mathrm{V}$ car battery can supply a current of $10 \mathrm{A}$ for $5.0$ hours. Calculate how many joules of energy the battery transfers in this time.

A lamp is operated for $20 \mathrm{s}$. The current in the lamp is $10 \mathrm{A}$. In this time, it transfers $400 \mathrm{J}$ of energy to the lamp. Calculate:

(a) How much charge flows through the lamp.

A lamp is operated for $20 \mathrm{s}$. The current in the lamp is $10 \mathrm{A}$. In this time, it transfers $400 \mathrm{J}$ of energy to the lamp. Calculate:

(b) How much energy each coulomb of charge transfers to the lamp

A lamp is operated for $20 \mathrm{s}$. The current in the lamp is $10 \mathrm{A}$. In this time, it transfers $400 \mathrm{J}$ of energy to the lamp. Calculate:

(c) The p.d. across the lamp.