Please allow ads on our site
Please log in to access this content. You will be redirected to the login page shortly.
LoginAn electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be : (a) 100 W (b) 75 W (c) 50 W (d) 25 W
Physics Secondary School in Physics 1 year ago
:-Required power CONSUMED by the electric BULB is 25 W [Option.d] .Explanation :-We have :-→ Initial voltage (V) = 220 V→ Initial power (P) = 100 W→ NEW voltage (V') = 110 VTo find :-→ New power (P') .________________________________Firstly, let's calculate the resistance of the electric bulb .P = V²/R⇒ 100 = (220)²/R⇒ 100R = 48400⇒ R = 48400/100⇒ R = 484 ΩWe have got the resistance of the bulb . Now, we can calculate the new power consumed .P' = (V')²/R⇒ P' = (110)²/484⇒ P' = 12100/484⇒ P' = 25 W
Posted on 11 Jul 2024, this text provides information on Physics related to Secondary School in Physics. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Take Quiz To Earn Credits!
Turn Your Knowledge into Earnings.
Answers
No matter what stage you're at in your education or career, TuteeHub will help you reach the next level that you're aiming for. Simply,Choose a subject/topic and get started in self-paced practice sessions to improve your knowledge and scores.
