Question

Please Give Right Answer Thank You.
The potential difference between the terminals of an heater is 60w when it draws an current of 4A from the source. what current will the heater draw if the potential difference is increased to 120 w?

Answer 1

given
v= 60w
I= 4A
so R= 60/ 4 = 15ohm
now
again V = 120w
R we got 15 ohm
so the new current will be 120/ 15= 8 A

Answer 2

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  $\propto$  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.