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Free download in PDF Coulombs Law Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like IIT-JEE, NEET, AIIMS etc. These short solved questions or quizzes are provided by Gkseries.
41
As one penetrates a uniformly charged sphere, the electric flied strength E
[A]
increases
[B]
decreases
[C]
is zero at all points
[D]
remains same as at surface
42
A charged oil drop is stationary between a pair of horizontal parallel plates. If the drop carries a charge 3.2×10-10 coulomb and has a mass 1.6×10-19 kg, then the potential difference between the plates is
[A]
50 V
[B]
80 V
[C]
100 V
[D]
cannot be calculated on the basis of given data
43
An electric field can deflect
[A]
x-rays
[B]
neutrons
[C]
α-particles
[D]
γ-rays
44
Electric lines of force enter or leave a charged surface at an angle of
[A]
90°
[B]
30°
[C]
60°
[D]
depends upon surface condition
45
One thousand electrons, each of which carries a charge of -1.6×10-12 coulomb are removed from an initially neutral pitch ball. The resulting charge on the pitch ball is
[A]
1.6×10-15 coulomb
[B]
1.6×10-23 coulomb
[C]
-1.6×10-15 coulomb
[D]
All Of The Above
Answer: 1.6×10-15 coulomb
46
Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charge will
[A]
remain in stable equilibrium
[B]
be in unstable equilibrium
[C]
not be in equilibrium
[D]
Any Of The Above
Answer: remain in stable equilibrium
47
One volt is the same as
[A]
one joule
[B]
one coulomb
[C]
one joule/coulomb
[D]
None of the above
Answer: one joule/coulomb
48
When a dielectric is placed in an electric field, the field strength
[A]
increases
[B]
decreases
[C]
remains unchanged
[D]
reduces to zero
49
A hollow metal sphere of radius 5 cm is charged such that potential on its surface is 10 V. The potential at the center of the sphere is
[A]
10 V
[B]
0 V
[C]
same as at point 5 cm away from the surface
[D]
same as at point 25 cm away from the surface
50
Out of the material given below, which has the highest dielectric strength
[A]
glass
[B]
mica
[C]
oiled paper
[D]
None Of The Above
51
Two equal and similar charges are placed a finite distance apart. A third equal and dissimilar charge is placed midway between them. The third charge will be
[A]
in stable equilibrium
[B]
in unstable equilibrium
[C]
neutralized
[D]
oscillating
Answer: in unstable equilibrium
52
A tiny particle carrying a charge of 0.3 C is accelerated through a potential difference of 1000 V. The kinetic energy acquired by the particle is
[A]
900 J
[B]
400 J
[C]
100 J
[D]
300 J
53
Two copper spheres A and B are of the same radii. Sphere A is hollow and Sphere B is solid. If both spheres are charged to the same potential
[A]
Both will hold the same charge
[B]
A will hold more charge as compared to B
[C]
B will hold more charge as compared to A
[D]
Both will not hold any charge
Answer: Both will hold the same charge
54
A parallel plate capacitor connected to a battery stores twice as much charge with a given dielectric as it does with air as dielectric, the susceptibility of the dielectric is
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