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A conducting sphere of radius r is initially charged to Q0 It is connected as shown in the fig. If switch S is closed at t = 0 then charge on the sphere at any time t is
The correct answer is:
Related Questions to study
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A time varying voltage is shown in fig. then 
is -
A time varying voltage is shown in fig. then is -
physics-General
physics-
The charge on the capacitor in steady state in the circuit shown is
The charge on the capacitor in steady state in the circuit shown is
physics-General
physics-
A rectangular loop of side a and b has a resistance R and lies at a distance c from an infinite wire carrying current I0 . The current decreases to zero in time t0
The charge flowing through the rectangular loop is
A rectangular loop of side a and b has a resistance R and lies at a distance c from an infinite wire carrying current I0 . The current decreases to zero in time t0
The charge flowing through the rectangular loop is
physics-General
physics-
In a spherical distribution the charge density varies as 
for 
(as shown) where A is a constant. A point charge Q lies at the centre of the sphere at r = 0 . The electric field in the region has a constant magnitude for
In a spherical distribution the charge density varies as for (as shown) where A is a constant. A point charge Q lies at the centre of the sphere at r = 0 . The electric field in the region has a constant magnitude for
physics-General
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Three charges Q, +q and +q are placed at the vertices of a right angled isosceles triangle as shown The net electric energy of configuration is zero if Q is equal to
Three charges Q, +q and +q are placed at the vertices of a right angled isosceles triangle as shown The net electric energy of configuration is zero if Q is equal to
physics-General
physics-
Figure shows a large conducting sheet having charge density 
on its both surfaces The surface potential of the sheet is V0. A sphere of radius r is placed at a distance l (l >> r) from the sheet as shown in figure When the key is closed a charge q appears on the surface of the sphere, the value of on the sheet is
Figure shows a large conducting sheet having charge density on its both surfaces The surface potential of the sheet is V0. A sphere of radius r is placed at a distance l (l >> r) from the sheet as shown in figure When the key is closed a charge q appears on the surface of the sphere, the value of on the sheet is
physics-General
physics-
Identical dielectric slabs are inserted into two identical capacitors A and B. These capacitors and a battery are connected as shown in figure. Now the slab of capacitor B is pulled out with battery remaining connected :
Identical dielectric slabs are inserted into two identical capacitors A and B. These capacitors and a battery are connected as shown in figure. Now the slab of capacitor B is pulled out with battery remaining connected :
physics-General
physics-
A capacitor of capacitance C0 is charged to a potential V0 and then isolated A small capacitor C is then charged from C0 , discharged and charged again; the process being repearted n times Due to this, potential of the larger capacitor is decreased to V. Value of C is :
A capacitor of capacitance C0 is charged to a potential V0 and then isolated A small capacitor C is then charged from C0 , discharged and charged again; the process being repearted n times Due to this, potential of the larger capacitor is decreased to V. Value of C is :
physics-General
physics-
S1 and S2 are two coherent sources of sound. OA = OB. AB = 2.7
, when lis the wave length of sound waves. Number of points of maximum intensity as one moves around the circular path of large radius centered at O shown in the figure will be
S1 and S2 are two coherent sources of sound. OA = OB. AB = 2.7, when lis the wave length of sound waves. Number of points of maximum intensity as one moves around the circular path of large radius centered at O shown in the figure will be
physics-General
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A wave pulse on a string has the dimension shown in figure The wave speed is v = 1 cm/s If point O is a free end The shape of wave at time t = 3 s is
A wave pulse on a string has the dimension shown in figure The wave speed is v = 1 cm/s If point O is a free end The shape of wave at time t = 3 s is
physics-General
physics-
A source having frequency f and a detector are projected in the same vertical plane as shown in the figure. Maximum frequency recored by the detector during flight is (2V0
velocity of sound in air)
A source having frequency f and a detector are projected in the same vertical plane as shown in the figure. Maximum frequency recored by the detector during flight is (2V0 velocity of sound in air)
physics-General
physics-
An equilateral triangle ABC is formed by joining three rods of equal length and D is the mid point of AB . The coefficient of linear expansion for AB is 
and for AC and BC is 
Find the relation between and , if distance DC remain constant for small changes in temperature
An equilateral triangle ABC is formed by joining three rods of equal length and D is the mid point of AB . The coefficient of linear expansion for AB is and for AC and BC is Find the relation between and , if distance DC remain constant for small changes in temperature
physics-General
physics-
In the adjacent figure, sini/sinr :
In the adjacent figure, sini/sinr :
physics-General
physics-
A narrow monochromatic beam of light of intensity I is incident on a glass plate as shown in figure. Another identical glass plate is kept close to the first one and parallel to it. Each glass plate reflects 25% of the light incident on it and transmits the remaining. Then the ratio of the maximum to minimum intensities in the interference pattern formed by the two beams obtained after one reflection at each plate is
A narrow monochromatic beam of light of intensity I is incident on a glass plate as shown in figure. Another identical glass plate is kept close to the first one and parallel to it. Each glass plate reflects 25% of the light incident on it and transmits the remaining. Then the ratio of the maximum to minimum intensities in the interference pattern formed by the two beams obtained after one reflection at each plate is
physics-General
physics-
A light ray is incident on a glass slab as shown in figure If the refractive index of glass is varying , which of the following figures shows the correct path of light ray .
A light ray is incident on a glass slab as shown in figure If the refractive index of glass is varying , which of the following figures shows the correct path of light ray .
physics-General
