Question

the potential difference between the terminal between the terminal of an electric heater is 60 volt when it draw current​

Answer 1

Correct Question:-

Potential difference between the terminals of an electric heater is 60 V when it draw a current of 4 A from the source. Find the resistance of heater.

Given that:-

Potential Difference (V)=60 V

Current Drawn (I)=4 A

Step by step explanation:-

By ohm's law,

$\large\rm { V = IR}$

$\large\rm { \implies 60 = 4 \times R}$

$\large\rm { R = \frac{60}{4} = 15 \Omega }$

Hence, resistance of heater is $\large\bf { 15 \Omega}$

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.