Question

details of 2 electric heaters are given.how much will be the heat developed if they are made to work for 2 minute each?​

Answer 1

Given:

Details of 2 electric heaters are given.

To find:

How much will be the heat developed if they are made to work for 2 minute each?​

Solution:

The heat developed by an electric heater is given by,

H = Pt = IVt = I²/Rt

where,

P = power generated

t = time

I = current flow

V = voltage

Considering the details of 2 electric heaters be:

For heater 1:

H = P₁ × 2 minute = P₁ × 2 × 60 = 120P₁ J

For heater 2:

H = P₂ × 2 minute = P₂ × 2 × 60 = 120P₂ J