The potential difference between the terminals of an electric heater
is 60 V when it draws a current of 4 A from the source. What
current will the heater draw if the potential difference is increased
to 150 V?
i8 i8
Answers
Answered by
0
Answer:
V=60VI=4A
R=
I
V
=
4
60
=15Ω
When potential difference is increased to 120V
I=
R
V
=
15
120
=8A
The current through the heater becomes 8A
Answered by
0
Answer:
The current through the heater becomes 8 A.
Explanation:
Given,
The potential difference between the terminals of an electric heater is 60 V.
Current of 4 A is drawn from the source.
To find: What current will the heater draw if the potential difference is increased to 120 V
Solution:
According to Ohm's law, Potential difference is directly proportional to current.
i.e V I
or, V = iR
here, V = 60 V and i = 4 A
Substituting the values,
R = V / i = 60 / 4 = 15 Ω
Now, V is increased to 120 V.
Again using ohm's law,
i = V / R = 120 / 15 = 8 A
Therefore, The current through the heater becomes 8 A.
Similar questions