CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Energy of a Capacitor

Two conductor...

Question

Two conductors are placed at large distance, they are connected by wire & switch, find loss in energy of system (after switch is closed)

A

20 n J

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

10 n J

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

7 n J

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B zero
We know, $V = \frac{Q}{C}$
Calculating we get $V_{1} = 5 V$ and $V_{2} = 5 V$
Both conductors are at some potential, no transfer of charge, system was at minimum energy, hence no loss of energy will take place.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Two metal spheres of radius R and 2R are placed at very large distance from each other and they are connected by a coil of inductance L as shown in figure. One of the spheres (radius R) is given charge Q. At what time after closing switch S does charge on this sphere becomes zero?

Q. Four identical parallel conductors, carrying charges

Q, - 2 Q, 3 Q

4 Q

are placed as shown in the figure. The plates carrying charges

Q

4 Q

, are connected through a switch, as shown. The amount of charge flowing through the switch, after closing it is found to be

n Q

n

.

C

is charged by a battery of

V

volts . Then it is connected to an uncharged capacitor

2 C

as shown in figure. No match the following two columns.

Column-1 Column-2

$(a)$ After closing the switch energy stored in $C$ .	$(p) \frac{1}{9} C V^{2}$
$(b)$ After closing the switch energy stored in $2 C$ .	$(q) \frac{1}{6} C V^{2}$
$(c)$ After closing the switch loss of energy during redistribution of charge.	$(r) \frac{1}{18} C V^{2}$
$(s)$ None of these

Q. Two long conducting rods suspended by means of two insulating threads as shown in figure are connected at one end to a charged capacitor through a switch

S

, which initially open. At the other end, they are connected by a loose wire. The capacitor has charge

Q

and mass per unit length of the rod is

λ

. The effective resistance of the circuit after closing the switch is

R

. If the velocity of each rod when the capacitor is discharged after closing the switch is

v = \frac{μ_{0} Q^{2}}{x π d R C λ l}

. Find x.(Assume that the displacement of rods during the discharging time is negligible)

Q. Two capacitors of capacity

6 μ F

3 μ F

100 V

50 V

separately and connected as shown in figure. Now all the three switches

S_{1}, S_{2}

S_{3}

are closed. Suppose

q_{1}, q_{2}

q_{3}

be the magnitudes of charge flowing from switches

S_{1}, S_{2}

S_{3}

after they are closed. Then :

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Energy of a Capacitor

PHYSICS

Watch in App

explore_more_icon

Explore more

Energy of a Capacitor

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon