Coulombs Law MCQs | Coulombs Law Short Questions and Answers

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Questions
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

Answer: increases
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

Answer: 80 V
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43 An electric field can deflect
A x-rays
B neutrons
C α-particles
D γ-rays

Answer: α-particles
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

Answer: 90°
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

Answer: decreases
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

Answer: 10 V
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

Answer: glass
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

Answer: 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
A 0
B 1
C 2
D 3

Answer: 1
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