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For a heater rated at 4 kW ; 220 V . C
Question
For a heater rated at
4
k
W
;
2
2
0
V
. Calculate the resistance of the heater element.
A
2
0
Ω
B
2
1
.
6
Ω
C
2
0
0
Ω
D
1
2
.
2
Ω
Easy
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Solution
Verified by Toppr
Correct option is D)
Given:
V
=
2
2
0
volts
P
=
4
0
0
0
W
Electric power is given by
P
=
R
V
2
where
R
is resistance and
V
is voltage.
∴
Resistance of the heater
R
=
P
V
2
=
4
0
0
0
2
2
0
2
=
1
2
.
1
Ω
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