Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

Find heat developed in connecting wire
question image
Asked by ashutosharnold1998 | 02 Oct, 2019, 01:14: AM
answered-by-expert Expert Answer
Initial charge Q on 50 μf capacitor when it is charged with 20 V battery ,
 
Q = C V = 50×10-6 × 20 = 1000 × 10-6 μC = 1 mC
 
when the chraged 50 μf capacitor is connected across 10 V battery,
 
charge retained by capacitor = 50×10-6 × 10 = 500 ×10-6  = 0.5 mC
 
Hence excess charge 0.5 mC will be flown to battery .
 
Since capacitor is at higher potential than bettery, work will be done by capacitor to pass the charges to battery.
 
workdone to pass the excess charge 0.5 mC to a 10 V battery , W = Q × V = 0.5×10-3 × 10 = 5 mJ
 
Energy loss by capacitor = (1/2) C [ Vi2 - Vf2 ]  = (1/2)×50×10-6 [ 202 - 102 ] = 7.5 × 10-3 J  = 7.5 mJ
 
Out of this 7.5 mJ energy lost by capacitor, 5 mJ energy is spent to pass the excess charges to battery.
 
Remaining 2.5 mJ is dissipated as heat in connecting wires.
 
 
 
Answered by Thiyagarajan K | 02 Oct, 2019, 14:06: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Physics
a marble block of mass 2 kg lying on ice when a given velocity of 6 ms–1 is stopped by friction in 10 seconds then co efficient of friction is
Asked by sumalathamadarapu9 | 23 Oct, 2024, 22:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
show that the frequency of oscillations remain unchanged whether a mass attached to a spring is made to oscillate in the vertical or in the horizontal direction
Asked by py309649 | 13 Oct, 2024, 13:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
Square of the time period of revolution of a planet is proportional to the cube of the mean distance between sun and planet. If mean distance is increased by 2% then percentage change in its time period is
Asked by coolskrish | 13 Oct, 2024, 12:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
two particles of mass m and 4m are initially actress the sad moving towards each other due to mutual gravitational force at an instantly of m is vî then at this instant the velocity of mass 4m is
Asked by midnightmoon3355 | 09 Oct, 2024, 09:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
what is the second law of thermodynamics
Asked by rambabunaidu4455 | 03 Oct, 2024, 16:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
what is the relation between drift velocity and mobility
Asked by ratchanavalli07 | 17 Sep, 2024, 07:46: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
A ball of mass m approaches a moving wall of infinite mass with speed v along the normal to the wall. The speed of the ball is u towards the ball. The speed of the ball after elastic collision with the wall is
Asked by yayashvadutta45 | 15 Sep, 2024, 19:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
a current of 2a is flowing through a conductor of length 22m bent in arc radius 5cm
Asked by adithireddy999 | 03 Sep, 2024, 09:35: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
two vectors vector a and vector B lie in one plane vector c lie in the different plane then vector a + vector b + vector c is
Asked by vaishalinirmal739 | 29 Aug, 2024, 18:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
What is impulse?
Asked by vradhysyam | 26 Aug, 2024, 17:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt