Question

four bulbs of 100w each are connected at 220v find the reading in an ideal ammeter

Answer 1

power=100watt
voltage= 220 volt
to find: current =?
as we know, power=voltage ×current
means current =power÷voltage
I=100÷220
I=0.4545 ampere

Answer 2

Dear Student,

◆ Answer -

I = 1.818 A

● Explanation -

# Given -

P = 100 W

V = 220 V

# Solution -

Total power dissipated by 4 bulbs,

Pt = 4 × 100

Pt = 400 watt

But power is calculated by formula -

P = VI

I = P/V

Substitute values

I = 400 / 220

I = 1.818 A

Hence, ammeter will give reading of 1.818 A.

thanks dear. Hope this helps you...