CUET Level II NEET Mock Test-2 (Physics 2024-2025)

Which of the following charges can not be present on an oil drop in Millikan's experiment :

• 4.0 × 10−19C

• 6.0 × 10−19C

• 10.0 × 10−19C

• all of them

In nature, the electric charge of any system is always equal to :

• half integral multiple of the least amount of charge

• zero

• square of the least amount of charge

• integral multiple of the least amount of charge

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 its surface.

• negative and appears only at the point on the sphere closest to the point charge

• negative and distributed non-uniformly over its entire surface of the sphere

• zero

Force between two identical spheres charged with same charge is F. If 50% charge of one sphere

is transferred to the other sphere then the new force will be :

• 3/4 F

• 3/8 F

• 3/2 F

• None of these

Two point charges placed at a distance 'r' in air exert a force 'F'. The distance at which they exert

same force when placed in a certain medium (dielectric constant K) is :

• rK

• r/K

• r⁄√K

• r√K

Two charges are placed as shown in figure. Where should a third charge be placed so that it

remains at rest ?

• 30 cm from 9e

• 40 cm from 16e

• 40 cm from 9e

• (1) or (2)

Two point charges +9q and +q are kept 16 cm apart. Where should a third charge Q be placed

between them so that the system remains in equilibrium ?

• 24 cm from + 9q

• 12 cm from + 9q

• 24 cm from + q

• 12 cm from + q

Two balls carrying charges +7C and –5C attract each other with a force F. If a charge –2C is added

to both, the force between them will be :

• F

• F/2

• 2F

• Zero

Two equal and like charges when placed 5 cm apart experience a repulsive force of 0.144

newtons. The magnitude of the charge in micro–coulomb will be

• 0.2

• 2

• 20

• 12

Two point charges of +2μC and +6μC repel each other with a force of 12N. If each is given an

additional charge of– 4μC, then force will become:

• 4 N (attractive)

• 60 N (attractive)

• 4 N (repulsive)

• 12 N (attractive)