An electronic component must be operated at a potential difference of exactly for…

PHYSICS · Multi-part · CBSE · Physics · Electricity · Electricity

Problem

An electronic component must be operated at a potential difference of exactly

1\,\text{V}

for proper functioning. A variable energy source is available in the laboratory. (i) Derive an expression for the charge

Q

that must be moved when the available energy from the source is

W

to maintain the required potential difference of

1\,\text{V}

. (ii) The source can supply up to

120\,\text{J}

of energy in a single discharge. Calculate the maximum charge that can pass through the component while still maintaining

1\,\text{V}

. (iii) If the experiment requires

12\,\text{C}

of charge to pass, determine the minimum energy that must be supplied. Comment on whether the

120\,\text{J}

source is adequate. (iv) Show that if the energy supplied per coulomb deviates by

0.2\,\text{J}

from

1\,\text{J}

, the potential difference deviates by the same numerical amount in volts. Give a brief justification.