Question

How much will be the heat developed if 0.2 A current flows through a conductor of resistance 200 ohm for 5 minute?​

Answer 1

Explanation:

How much will be the heat developed if 0.2 A current flows through a conductor of resistance 200 Q for 5 minute?

H = I2Rt

= (0.2)2 x 200x300

= 2400 J

Therefore heat generated = 2400

R = 200 Ω

I =0.2 A

t = 5 x 60 s

t = 300 s

If 4.2 J is one calorie then H =_________

Heat generate / one calorie = \frac{2400}{4.2} = 571.4285714285714 = 571.43

Answer 2

Explanation:

$We \: know \: that \: H = { I}^{2} RT \\ where \: I = 0.2 \: A,R = 200 \: Ω \: and \: t = 5 \: minutes \\ 1 \: minute \: = 60 \: s \\ 5 \: minutes \: = 5 \times 60 = 300 \: s \\ H = { I}^{2} RT \\ H = {(0.2)}^{2} \times 200 \times 300 \\ H = 0.04 \times 60000 \\ H = 2400 \: J$ Heat produced = 2.4 kJ

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