Question

The potential difference between the terminals of an electric heater is 250v, when it draws a current of 10a . What current will the heater draw if potential difference is increased to 300v

Answer 1

Answer:

1.) v=250v

I=10a

V=RI

250=R×10

R=250/10

R=25 ohm

2.)v=300

I=?

R=25 ohm

V=RI

300=25×I

I=300/25

I=12ampere

Answer 2

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Given :

V (potential difference) = 250 V

I (current) = 10 A

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To find :

Iᛌ = ?

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Solution :

According to Ohm's Law,

V = IR

∴ R = V/I

= ²⁵⁰⁄₁₀

∴ R = 25 Ω

Now, V (potential difference) is increased to 300 V.

∴ I = V/R

= ³⁰⁰⁄₂₅

∴ I = 12 A

The heater will draw a current of 12 A.

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