Pradeep Paul, R Parthasarthy and, Basha Solutions for Chapter: Electricity, Exercise 1: PAPER - PEN TEST : 1

Name the device used to measure the potential difference across a conductor.

Identify the insulators and conductors from the following: Mica, Mercury, Porcelain, Nichrome, Air, Aluminium, Cotton, Copper, Silver and Sulphur.

Calculate the work done in moving a charge of $4 \mathrm{C}$ from a point at $220 \mathrm{V}$ to another point at $230 \mathrm{V}$.

Define the term potential difference.

Comment : "The potential difference between two points is $1$ volt".

How is a voltmeter connected in a circuit? Explain with a neat diagram.

Voltmeter has a low or high resistance. Justify your answer.

How much energy is transferred by a $24 \mathrm{V}$ power supply to each coulomb of charge which it moves around the circuit?