the potential difference between the terminals of an electric heater is 60 volt when it through a current of 4 ampere from source .what will be the heater drew if potential difference is increased to 120 volt
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Answered by
2
given I=4A,V=60V,R=?
wkt by Ohm's law,
V=RI
V/I=R
R=60/4
R=15ohm
again,V=120V,R=15ohm,I=?
wkt,V=RI
V/R=I
I=120/15
I=8A.
wkt by Ohm's law,
V=RI
V/I=R
R=60/4
R=15ohm
again,V=120V,R=15ohm,I=?
wkt,V=RI
V/R=I
I=120/15
I=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.
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