ELECTRICAL ENERGY AND HOUSEHOLD CIRCUITS-I

A heater draws a current of 5 A at 220 V for 2 minutes. What is the energy consumed by the heater?

• 66 kJ

• 132 kJ

• 264 kJ

• 396 kJ

A geyser consumes 2 kW of power when operated at 250 V. What is the current flowing through the geyser?

• 4 A

• 8 A

• 12 A

• 16 A

A geyser consumes 2 kW of power when operated at 250 V. What is the resistance offered by the geyser?

• 15.625 Ω

• 31.25 Ω

• 62.5 Ω

• 125 Ω

An electric bulb is marked 100 V, 250 W. What current will the bulb draw if connected to a 250 V supply?

• 0.4 A

• 1.0 A

• 2.5 A

• 6.25 A

What is the quantity of heat produced in a 20 Ω resistor carrying a 2.5 A current in 5 minutes?

• 18.75 kJ

• 37.5 kJ

• 75 kJ

• 150 kJ

A current of 2 A produces 60 J of heat in 10 seconds while passing through a conductor. What is the resistance of the conductor?

• 0.75 Ω

• 1.5 Ω

• 3 Ω

• 6 Ω

A 10 V tungsten filament lamp connected to a 10 V battery draws a current of 2 A. What is the resistance of the filament?

• 2.5 Ω

• 5 Ω

• 10 Ω

• 20 Ω

A 10 V tungsten filament lamp connected to a 10 V battery draws a current of 2 A. What is the power of the lamp?

• 5 W

• 10 W

• 20 W

• 40 W

A 10 V tungsten filament lamp connected to a 10 V battery draws a current of 2 A. What is the electrical energy consumed by the lamp in 3 hours?

• 20 Wh

• 40 Wh

• 60 Wh

• 120 Wh

A bulb rated 40 W, 120 V is operated at 80 V. What is the current flowing through the bulb?

• 0.11 A

• 0.22 A

• 0.33 A

• 0.44 A