railway RRB Technician Grade 3 Mock Test 2024 General Science Physics

An electric iron of resistance 20 ohm takes a current of 5 A. The heat flow in 30 s is:

1
\(1.5 \times 10^4 \ J\)
2
\(2.5 \times 10^2 \ J\)
3
\(1.5 \times 10^5 \ J\)
4
\(1.5 \times 10^2 \ J\)
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