An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W.

Question

An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W. (A) 20 Ω (B) 30 Ω (C) 5 Ω (D) 10 Ω

Tardigrade Admin · Accepted Answer

500 watt at 100 v <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/16774da3ff7a53b42d8548b792c18ada-.png" /> P = Vi 500= Vi i =5 Amp V = i × R R =20

Q. An electric bulb of $500$ watt at $100$ volt is used in a circuit having a $200 V$ supply. Calculate the resistance $R$ to be connected in series with the bulb so that the power delivered by the bulb is $500 W$ .

$20 Ω$

$30 Ω$

$5 Ω$

$10 Ω$

$500$ watt at $100 v$

$P = Vi$
$500 = Vi$
$i = 5$ Amp
$V = i \times R$
$R = 20$

Q. An electric bulb of 500 watt at 100 volt is used in a circuit having a 200V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500W.

20Ω

30Ω

5Ω

10Ω