Question

The pottential difference the terminals of an
electric heater is 120v. When it draws a
current of 8A from the source. What will be
be the current drawn if pottential difference des
is 240v​

Answer 1

Answer:

Explanation:

V =  120 V

I = 8 A

V₁ = 240 V (New Potential Difference)

For Finding R

V= IR [Ohm's Law]

120 = 8R

R = 120/8

R=15 Ω

For Finding I₁ (New Current)

V₁ = RI₁  [Ohm's Law]

240 = 8 I₁ (R remains constant)

I₁ = 240/8

I₁ = 3 A

∴ The current is 3 A if the potential difference is 240 V

Answer 2

Answer:

Given:

When Potential Difference across the terminals of Electric Heater is 120 v, the current drawn is 8A.

To find:

Current drawn in case of potential Difference of 240 Hz.

Concept:

From the 1st case , we need to calculate the resistance of the Electric Heater. Using the resistance value, we can calculate the current drawn in the 2nd case.

Definitions:

1. Current : Rate of flow of charges

2. Resistance : A property by the virtue of which flow of charges is opposed.

Calculation:

1st case :

$I1 = \dfrac{V1}{R }$

$=>R \: = \dfrac{V1}{I1} = \dfrac{120}{8} = 15 \: ohm$

So, 2nd case :

Current drawn be I2.

$I2 = \dfrac{V2}{R } = \dfrac{240}{15} = 16 \: amperes$

So final answer :

$\: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \red{ \sf{ \bold{ \huge{16 \: amp}}}}}$