Draw circuit symbols for (a) fixed resistance (b) variable resistance (c) a cell (d) a battery of three cells(e) an open switch (j) a closed switch.

A radio set draws a current of 0.36 A for 15 minutes. Calculate the amount of electric charge that flows through the circuit.

Why should the resistance of :

(a) an ammeter be very small?

(b) a voltmeter be very large?

What is a circuit diagram? Draw the labelled diagram of an electric circuit comprising of a cell, a resistor, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance: an ammeter or a voltmeter?

If the charge on an electron is 1.6 x I0^-19 coulombs, how many electrons should pass through a conductor in 1 second to constitute 1-ampere current?