Question

A certain class of lamp takes 0.45A at 220V. How many such lamp can be run for an expenditure of power equal to 1 1/3 horsepower?

Answer 1

Answer

Current in lamp I=0.45A

Voltage V=220V.

Power of single lamp

P=VI=$220\times0.45=99 Watts.$

Now given power

$No \space of \space Bulb. =\frac{113\times746}{99}=852$