Worksheets on Electricity

Electricity Worksheet-7

6. Calculate the equivalent resistance of the network across the points A and B shown in the figure.

7. Three resistors are connected as shown in the figure. Through the resistor of 5 Ω, a current of 1 A is flowing.

(a) Find the potential difference across AB and across AC?

(b) Find the current through the other two resistors?

(c) Find the total resistance?

Electricity Worksheet-8

1. An electric lamp, whose resistance is 20 Ω and a conductor of 4 Ω resistances are connected to a 6 V battery as shown in the figure. Calculate the total resistance of the circuit, the current through the circuit and the potential difference across the electric lamp and the conductor.

2. Three resistors of 2Ω, 3Ω and 4Ω are connected in (a) series (b) parallel. Find the equivalent resistance in each case.

3. Calculate the equivalent resistance between the points A and B in the circuits shown in figures.

Electricity Worksheet-9

1. A parallel combination of three resistors takes a current of 7.5 A from a 30 V supply. If the two resistors are 10 Ω and 12 Ω. Find the third one.

2. A wire whose resistance is 80 Ω is cut into three pieces of equal lengths which are then arranged in parallel. Calculate the resistance of the combination.

3. Five resistors, each 3 Ω, are connected as shown here. Calculate the resistance between the points (i) A and B (ii) between the point C and D.

4. An electric bulb is rated at 200 V-100 W. what is its resistance? Five such bulbs burn for four hours. What is the electrical energy consumed? Calculate the cost if the rate is 50 paise per unit.