A 75 W lamp is designed to be used on 15 V. What is its resistance? If the lamp is to be used on 120 V, what resistance must be connected in series with it?

State the uses of resistance connected in series with the galvanometer.

What is the effective resistance when two or more resistors are connected in series?

A potentiometer wire has a length of 4 m and resistance of 4 Omega . What resistance must be connected in series with the potentiometer wire and a cell of e.m.f. 2 V having internal resistance 2 Omega to get a potential drop of 10^-3V/(cm) along the wire?

Find the effective resistance of the combination of two resistors of resistances 10 Omega and 15 Omega connected in series (ii) parallel.

Why is a resistance connected in series with a zener diode when used in a circuit?

Find the resistance of 60 W, 240 V bulb.

Resistances P = 10 Omega , Q = 15 Omega , R = 25 Omega and S = 50 Omega are connected in the arms AB,BC,CD and DA respectively of a Wheatstone's network ABCD . The cell is connected between points A and C . What resistance has to be connected in parallel with 'S' to balance the network ?

When a resistance of 100Omega is connected in series with a galvanometeer of resistance R, its range is V. To double its range, a resistance of 1000Omega is connected in series. Find R.

A voltmeter reads 3 V at full-scale deflection and is graded as 6000 Omega//V . What resistance should be connected in series with it so that it reads 12 V at full scale deflection ?

A series combination of resistances is used to increase the resistance of a circuit.