Question

An electric heater rated 1000w /220v what should be the resistance of ammeter and voltmeter when connected in circuit

Answer 1

given:

v= 220v

p= 1000w

p=vi

i= p/v

i= 1000/ 220

i = 4.54A

v=ir

r =v/i

= 220/ 4.54

= 49 ohm