Question

an electric iron of resistance 20 ohm take a current of 5 ampere calculate the heat developed in 30 second

Answer 1

Given-

current (I) -5A
resistence (R)-20 ohm
time(T)-30 s

To find-

heat- ?

We know that-

H= I^2 ×R×T
H=5^2×20×30
H=25×20×30
H=15000 joule.

Answer 2

Hey mate ^_^

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Answer:
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Given:

Resistance(R) = 20 Ω
Electric current (I)= 5 A
Time(t)= 30 s

Now,

H = I^2 Rt

= 5 × 5 × 20 × 30

= 15000 J

= 1.5 × 10^4J

∴ The heat developed in 30s is 1.5×10^4J

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