Column-I gives certain situations involving two thin conducting shells connected by a conducting wire via a key K. In all situation one sphere has net charge +q and other sphere has no net charge. After the key K is pressed, column-II gives some resulting effect.
Column-I gives certain situations involving two thin conducting shells connected by a conducting wire via a key K. In all situation one sphere has net charge +q and other sphere has no net charge. After the key K is pressed, column-II gives some resulting effect.
Text Solution
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The correct Answer is:
(A) p, q (B) p, q (C) p, q s (D) r, s
(A) Initially, the potential difference exist between both shells, so positive charge is flow from high to low potential.
Wvery system wants to acquire minimum potential energy if possible for stability. So charge flown to achieve it.
(B) As explained in [A], charge flow does not depends on the size of sphere.
(C) Charge flow through wire until the potential becomes same for both shells.
(D) Potential is same everywhere inside a conducting shell. So no charge is flow through connecting wire, so no heat is produced.
Wvery system wants to acquire minimum potential energy if possible for stability. So charge flown to achieve it.
(B) As explained in [A], charge flow does not depends on the size of sphere.
(C) Charge flow through wire until the potential becomes same for both shells.
(D) Potential is same everywhere inside a conducting shell. So no charge is flow through connecting wire, so no heat is produced.
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Column I gives certain situations involving two thin conducting shells connected by a conducting wire via a key K. In all situations, one sphere has net charge +q and other sphere has not net charge. After the key K is pressed, column II gives some resulting effects. Match the figures in Column I with the statement in Column II.
The two conducting spherical shells are joined by a conducting wire and cut after some time when charge stops flowing. Find out the charge on each sphere after that.
Knowledge Check
A solid metallic sphere of radius a is surrounded by a conducting spherical shell of radius b(bgt a ). The solid sphere is given a charge Q. A student measures the potential at the surface of the solid sphere as V and the potential at the surface of spherical shell as V_b . After taking these readings, he decides . to put charge of -4Q on the shell. He then noted the readings of the potential of solid sphere and the shell and found that the potential difference is /_\V . He then connected the outer spherical shell to the earth by a conducting wire and found that the charge on the outer surface of the shell as He then decides to remove the earthing connection from the shell and earthed the inner solid sphere. Connecting the inner sphere with the earth he observes the charge on the solid sphere as q_2 . He then wanted to check what happens if the two are connected by the conducting wire. So he removed the earthing connection and connected a conducting wire between the solid sphere and the spherical shelll. After the connections were made he found the charge on the outer shell as q_3 . Potential difference (/_\CV) measured by the student between the inner solid shere and outer shell after putting a charge -4Q is
A solid metallic sphere of radius a is surrounded by a conducting spherical shell of radius b(bgt a ). The solid sphere is given a charge Q. A student measures the potential at the surface of the solid sphere as V and the potential at the surface of spherical shell as V_b . After taking these readings, he decides . to put charge of -4Q on the shell. He then noted the readings of the potential of solid sphere and the shell and found that the potential difference is /_\V . He then connected the outer spherical shell to the earth by a conducting wire and found that the charge on the outer surface of the shell as He then decides to remove the earthing connection from the shell and earthed the inner solid sphere. Connecting the inner sphere with the earth he observes the charge on the solid sphere as q_2 . He then wanted to check what happens if the two are connected by the conducting wire. So he removed the earthing connection and connected a conducting wire between the solid sphere and the spherical shelll. After the connections were made he found the charge on the outer shell as q_3 . Potential difference (/_\CV) measured by the student between the inner solid shere and outer shell after putting a charge -4Q is
A
`V_a-3V_b`
B
`3(V_a-V_b)`
C
`V_a`
D
`V_a-V_b`
A solid conducting sphere of radius 10 cm is enclosed by a thin metallic shell of radius 20 cm . A charge q = 20 mu C is given to the inner sphere is connected to the shell by a conducting wire.
A solid conducting sphere of radius 10 cm is enclosed by a thin metallic shell of radius 20 cm . A charge q = 20 mu C is given to the inner sphere is connected to the shell by a conducting wire.
A
12 J
B
9 J
C
24 J
D
zero
Assertion : When two charged spheres are connected to each other by a thin conducting wire, charge flow bigger sphere to smaller sphere, if initial charges on them are same. Reason : Electrostatic potential energy will be lost in redistribution of charges.
Assertion : When two charged spheres are connected to each other by a thin conducting wire, charge flow bigger sphere to smaller sphere, if initial charges on them are same. Reason : Electrostatic potential energy will be lost in redistribution of charges.
A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
C
If Assertion is true but Reason is false.
D
If Assertion is false but Reason is true.
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