Question

a coil of resistance 8ohm is joind to a battry of 14 vots the current pass through it for 30minutes determine the heat producted in the coil​

Answer 1

Answer:

H=VIt= V×V×t/R

H= 14×14×1800/8= 196×225

Answer 2

We know ,

Heating effect produced in the coil=

H= I×I×R×T

=(I )2RT

Resistance= 8 ohm

Potential difference=14 V

V=IR

Therefore,

I=V/R = 14/8

Therefore,

H= 14/8 × 14/8 × 8 × 1800.

[30 min=1800secs]

= 44100J

=44.1 ×10^3 J

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