Questions
A" B, C are identical bulbs. How does the brightness of A and B change when the switch S is closed ?
detailed solution
Correct option is A
When the switch 5 is closed the resistance C comes in parallel with the resistance B, As B and C becomes in parallel, the resistance of combination is halved. As a result the resistance of the circuit decreases and current increases. But the current through B decreases. Hence the brightness of A increases and that of decreases.Talk to our academic expert!
Similar Questions
A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
