Physics-
General
Easy
Question
A charged capacitor is discharged separately through three resistors R1, R2, R3. The discharging graph are shown in figure . The correct relation between R1, R2 and R3 is given by
The correct answer is:
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physics-
The q versus t graph of a capacitor charged with a cell of emf 5 V is shown in figure The resistance R of the circuit is
The q versus t graph of a capacitor charged with a cell of emf 5 V is shown in figure The resistance R of the circuit is
physics-General
physics-
In the circuit shown, the switch S is closed at t = 0, then instantaneous charge on the capacitor is
In the circuit shown, the switch S is closed at t = 0, then instantaneous charge on the capacitor is
physics-General
physics-
In the circuit shown in figure :
In the circuit shown in figure :
physics-General
physics-
A resistance of 400 
is connected in series with an inductor of 
H and this combination is connected across an A.C source as shown in figure .
A resistance of 400 is connected in series with an inductor of H and this combination is connected across an A.C source as shown in figure .
physics-General
physics-
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
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
physics-General
physics-
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
physics-
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
physics-
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
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