A hollow conducting sphere of radius 1 m is given a positive charge of 10 μC. The electric field at the centre of the hollow sphere will be:
1. 60×103 Vm1 2. 90×103 Vm1
3. zero 4. infinite
Subtopic:  Gauss's Law |
 93%
From NCERT
AIPMT - 1998
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A charge q is placed in a uniform electric field E. If it is released, then the kinetic energy of the charge after travelling distance y will be:

1. qEy 2. 2qEy
3. qEy2 4. qEy
Subtopic:  Electric Field |
 77%
From NCERT
AIPMT - 1998
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The electric field at the equator of a dipole is E. If the strength of the dipole and distance are now doubled, then the electric field will be:

1. E/2 2. E/8
3. E/4 4. E
Subtopic:  Electric Dipole |
 68%
From NCERT
AIPMT - 1998
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A point Q lies on the perpendicular bisector of an electric dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then the electric field at Q is proportional to:
1. p2 and r3
2. p and r2
3. p1 and r2
4. p and r3

Subtopic:  Electric Dipole |
 87%
From NCERT
AIPMT - 1998
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In the Millikan oil drop experiment, a charged drop falls with a terminal velocity v. If an electric field E is applied vertically upwards it moves with terminal velocity 2v in the upward direction. If the electric field reduces to E2 then its terminal velocity will be:
1. v2
2. v
3. 3v2
4. 2v

Subtopic:  Electric Field |
From NCERT
AIPMT - 1999
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The electric field at centre O of a semicircle of radius a having linear charge density λ is given by:

1. 2λϵ0a 2. λπϵ0a
3. λ2πϵ0a 4. λπϵ0a
Subtopic:  Electric Field |
 83%
From NCERT
AIPMT - 2000
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If a charge Q is situated at the corner of a cube, the electric flux passing through all six faces of the cube is:

1. Q6ε0 2. Q8ε0
3. Qε0 4. Q2ε0

Subtopic:  Gauss's Law |
 69%
From NCERT
AIPMT - 2000
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Who evaluated the mass of electron indirectly with help of charge:
1. Thomson
2. Millikan
3. Rutherford
4. Newton

Subtopic:  Electric Charge |
 78%
From NCERT
AIPMT - 2000
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If a charge Q μC is placed at the centre of the cube, the flux (In SI unit) coming out from any surface will be:
1. Q6ε0×106 2. Q6ε0×103
3. Q2ε0 4. Q8ε0
Subtopic:  Gauss's Law |
 88%
From NCERT
AIPMT - 2001
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A dipole with moment p is placed in a uniform electric field E. The torque acting on the dipole is given by:
1. τ=pE
2. τ=p×E
3. τ=p+E
4. τ=pE

Subtopic:  Electric Dipole |
 91%
From NCERT
AIPMT - 2001
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