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Byju's Answer
Standard X
Physics
Electric Power
An electric b...
Question
An electric bulb consumes
7.2
kJ
of electrical energy in
2
minutes. What is the power of the bulb?
A
40
W
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B
50
W
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C
70
W
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D
60
W
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Solution
The correct option is
D
60
W
Given:
Energy
E
=
7.2
kJ
=
7.2
×
10
3
J
Time
t
=
2
min
=
2
×
60
=
120
s
We know that power,
P
=
Energy
t
=
7.2
×
10
3
120
=
60
W
∴
The power of the electric bulb is
60
W
.
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