Question

An electric iron operating at 120 volts draws 10 amperes of current.How much heat energy is delivered by the iron in 30 seconds

Answer 1

$\mathfrak{\large{\underline{\underline{Answer:-}}}}$

Heat produced = 36 KJ

$\mathfrak{\large{\underline{\underline{Given:-}}}}$

Current drawn by electric iron = 10 A

Voltage = 120 v

Time for which current flow = 30 second

$\mathfrak{\large{\underline{\underline{To find :-}}}}$

Heat produced = ?

$\mathfrak{\large{\underline{\underline{Solution:-}}}}$

The heat produced in conductor is given by Joule's law of heating

According to joule's law of heating :-

★ $\boxed{\sf{H = V I T}}$

put the value of V,I, and T in formula

we get,

$\implies$ $\bold{H = 120 × 10 × 30 }$

$\implies$ $\bold{H = 36,000 j or 36 kj}$

hence, the heat produced by electric irons is 36 kj.

Answer 2

Answer:

Given