Question

a) Define Power and it's SI unit
b) A torch light bulb is rated 5V and 500mA.Calculate it's
I) Power II) Resistance
c) Energy consumed when it's lighted for 2 1/2 hrs​

Answer 1

Answer:

1. In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt,

2.calculate---

p=vi

5x500x10-³ w

=2.5

R=v/r

=5/500x10-³

=10-²

3.energy=pt

2.5x4=10