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Due to q1 an q2 only
Due to q2 only
Zero
Due to all
A long hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.
A potential difference appears between the two cylinders when a charge density is given to the inner cylinder
A potential difference appears between the two cylinders when a charge density is given to the outer cylinder
No potential difference appears between the two cylinders when a uniform line charge is kept along the axis of the cylinders
No potential difference appears between the two cylinders when same charge density is given to both the cylinders.
Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. The net charge on the sphere is then
Negative and distributed uniformly over the surface of the sphere
Negative and appears only at the point on the sphere closest to the point charge
Negative and distributed non-uniformly over the entire surface of the sphere
zero
Two equal negative charges –q are fixed at points (0,-a) on y-axis. A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will
Execute simple harmonic motion about the origin
Move to the origin remain at rest
Move to infinity
Execute oscillatory but not simple harmonic motion
A parallel plate air capacitor is connected to a battery. The quantities charge, voltage, electric field and energy associated charge, voltage, electric field and energy associated with this capacitor are given by Qo, Vo, Eo and Uo respectively. A dielectric slab is now introduced to fill the space between the plates with battery still in connection. The corresponding quantities now given by Q, V, E and U are related to the previous one as
Q>Qo
V>Vo
E>Eo
U>Uo
1 and 4
2 and 3
A 4 (F capacitor, a resistance of 2.5 M( is in series with 12 V battery. Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor. [Given In (2)= 0.693]
13.86s
6.93s
7s
1.4s
A moving coil galvanometer of resistant 100 ( is used as an ammeter using a resistance 0.1(. The maximum deflection current in the circuit so that the ammeter shows maximum deflection
100.1 mA
1000.1 mA
10.01 mA
1.01 mA
An ideal gas is filled in a closed rigid and thermally insulated container. A coil of 100 ( resistor carrying current I A for 5 minutes supplies heat to the gas. The change in internal energy of the gas is
10 kJ
30 KJ
20 KJ
0 KJ
Capacitor C1 of capacitance I micro-farad and capacitor C2 of capacitance 2 microfarad separately charged fully by a common battery. The two capacitors are then separately allowed to discharge through equal resistors at time t=0.
The current in each of the two discharging circuits is zero at t=0
The currents in the two discharging circuits at t=0 are equal but not zero
The currents in the two discharging circuits at t=0 are unequal
Capacitor C1 losses 50% of its initial charge sooner than C2 loses 50% of its initial charge
2 and 4
1 and 3