Physics, asked by kirtimansinghshekhaw, 11 months ago

An electric iron of resistance 20w takes a current of 5 A. Calculate the heat developed in 30s.

Answers

Answered by Sneha110061
2

Given that Resistance(R) = 20 Ω, Electric current (I)= 5 A and time(t)= 30 s

Now we know that H= I2Rt

= 5×5×20×30

= 15000J=1.5×104J

∴ The heat developed in 30s is 1.5×104J

Answered by kumarsinghvicky781
2

Answer: 5^2×20

=25×20

=500 j

Explanation:

Power = 20watt

Current = 5A

Time = 30sec

Formula:

H=I×I×R×t

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