The current through a $10 V$ tungsten filament lamp connected to a $10 V$ source of negligible resistance is $2 A$ . Calculate the electrical energy (in kWh) consumed in $5 h o u r s$ .

100 kWh

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.1 kWh

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

20 kWh

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.2 kWh

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
0.1 kWh

Given, $V = 10 V, I = 2 A, t = 5 h o u r s$

We know electrical energy $= V I t$

$∴$ Energy consumed $= 10 \times 2 \times 5 = 100 W h = 0.1 k W h$

Suggest Corrections

Similar questions

Q. A 10V electric bulb is connected to a 10V battery of negligible resistance. The resistance offered by the bulb is

1 Ω

. Find the electric energy in 1 hour.

2 A

current is flowing through a conductor which is connected to a

10 V

source, then resistance of conductor is:

Q. An electric bulb is connected to a

20

V battery of negligible internal resistance. The resistance offered by the bulb is

5

Ω

. The electrical energy consumed by the bulb in

3

hours is _____ kWh.

Question 26
A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5 $Ω$ when connected to a 10 V battery. Calculate the resistance of the electric lamp.
Now if a resistance of 10 $Ω$ is connected in parallel with this series combination, what change (if any) in current flowing through 5 $Ω$ conductors and the potential difference across the lamp will take place? Give reason.

Q. An electric heater of resistance

100 Ω

is connected to a main supply for 20 minutes. If 2A current flows through the filament of the heater, calculate the heat energy produced in the heater.

The current through a 10 V tungsten filament lamp connected to a 10 V source of negligible resistance is 2 A. Calculate the electrical energy (in kWh) consumed in 5 hours.

The correct option is C 0.1 kWh Given, V = 10 V, I = 2 A, t = 5 hours We know electrical energy =VIt ∴ Energy consumed =10×2×5 = 100 Wh = 0.1 kWh

The current through a $10 V$ tungsten filament lamp connected to a $10 V$ source of negligible resistance is $2 A$ . Calculate the electrical energy (in kWh) consumed in $5 h o u r s$ .

The correct option is C
0.1 kWh

Given, $V = 10 V, I = 2 A, t = 5 h o u r s$

We know electrical energy $= V I t$

$∴$ Energy consumed $= 10 \times 2 \times 5 = 100 W h = 0.1 k W h$