Question

An electric bulb is rated as 100 w,220v . It is used for 5 hours daily calculate
a.It's resistance while glowing
b.Energy consumed in kwh per day

Answer 1

Answer:

An electric lamp is marked 100W, 220V. It is used for 5 hours daily. Calculate.

(i) its resistance while glowing.

(ii) energy consumed in kwh per day

Answer 2

The resistance of the bulb is 484 ohms and the energy consumed by the bulb is 0.5 kWh.

Explanation:

Given that,

Power of the electric bulb, P = 100 W

Voltage of the electric bulb, V = 220 volts

The power of an electric bulb is given by :

$P=\dfrac{V^2}{R}$

$R=\dfrac{V^2}{P}$

$R=\dfrac{(220)^2}{100}$

R = 484 ohms

So, the resistance of the bulb is 484 ohms while the bulb starts glowing. The energy consumed per unit time is called power of the bulb. It is given by :

$P=\dfrac{E}{t}$

$E=P\times t$

$E=100\ W\times 5\ h$

$E=500\ Wh$

or

$E=0.5\ kWh$

So, the energy consumed by the bulb is 0.5 kWh. Hence, this is the required solution.

Learn more,

Electric current

https://brainly.in/question/1207109