Question

The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from a source. What current will be drawn if the potential difference is increased to 120V?

Answer 1

V =60 V ...I =4 A
according to ohms law 
R= V/I .....60/4= 15 OHMS
IF IT'S INC REAR ED TO 120 V...IT'S 120/15= 
8A 

Answer 2

Answer:

Explanation:

Given :-

Potential difference, V = 60 V

Current, I = 4 A

To Find :-

Resistance = ?

Formula to be used :-

 R = V/I

Solution :-

Putting all the values, we get

R = V/I

R= 60/4

R = 15 ohms.

Potential difference = 120 V

Resistance = 15 ohms

Current, I = ?

V = RI

I = V/R

I = 120/15

I = 8 Ampere.

Hence, The Potential difference is increased to 120 V then the current drawn is 8 Ampere.

Extra Information :-

Current :

Current is the rate of flow of charge. It is a scalar quantity. Its SI unit is ampere.