Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
2.0k views
in Physics by (76.6k points)
closed by
Two bulbs 25W, 220V and 100W, 220V are given. Which has higher resistance?
A. 25 w bulb
B. 100 W bulb
C. both bulbs will have equal resistance
D. resistance of bulbs cannot be compared

1 Answer

+1 vote
by (76.3k points)
selected by
 
Best answer
Correct Answer - A
Power of electric bulb
`P=(V^(2))/R`
So, resistance of electric bulb `R=(V^(2))/P`
Given `P_(1)=25 W , P_(2)=100 W, V_(1)=V_(2)=200V`
Therefore, for same potential difference `V, R prop 1/P`
Thus, we observe that for minimum power, resistance will be maximum and vice-versa. hence, resistance of 25W bulb is maximum and 100 W bulb is minimum.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...