A 500W heater is desigened to operatre at 200V potential differnce. It is connected across 160V line, find the heat it will produce in 20 minute.

A 500W electric heater is designed to work with a 200 V line. If the voltage of the line drops to 160V, then what will be the percentage loss of the heat developed?

A 500W electric heater is designed to work with a 200 V line. If the voltage of the line drops to 160V, then what will be the percentage loss of the heat developed?

A 100 W bulb designed to operate on 100 V is to be connected across a 500 V source . Find the resistance to be put in series so that bulb consumes 100 W only.

A 500 W heating unit is designed to operate from a 200 V line . By what percentage will its heat output drop if the line voltage drops to 160 V ? Find the heat produced by it in 10 min.

When a resistor of 5 Omega is connected across a cell, its terminal potential differnce is balanced by 140 cm of potentiometer wire and when a resistance of 8 Omega is connected across the cell, the terminal potential difference is balanced by 160 cm of the potentiometer wire. Find the internal resistance of the cell.