Electrostatics (NEET Physics): Questions 69 - 72 of 107

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Question number: 69

» Electrostatics » Electric Potential

MCQ▾

Question

A proton moves a distance d in a uniform electric field if as shown in the figure. Then which of the following statements are correct?

Proton and its direction

Proton and Its Direction

A proton moves a distance d in a uniform electric field is shown in figure

  1. Electric field do a negative work on the proton
  2. Electric potential energy of the proton increases
  3. Electric field do a positive work on the proton
  4. Electric potential energy of the proton decreases

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2

b.

1 and 3

c.

1, 2 and 3

d.

1 and 4

Question number: 70

» Electrostatics » Electric Potential

MCQ▾

Question

In a hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 x 10 -10 m. Then the electrical potential produced by the nucleus at the position of the electron is

Choices

Choice (4) Response

a.

-27.2V

b.

27.2V

c.

13.6V

d.

-13.6V

Question number: 71

» Electrostatics » Capacitors

MCQ▾

Question

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles, then

Choices

Choice (4) Response

a.

The electrostatic energy stored in the capacitor increases

b.

The voltage across the plates decreases

c.

The charge on the capacitor increases

d.

The capacitance increases

Question number: 72

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

An electric dipole has the magnitude of its charge is q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is perpendicular to the direction of the field, the force on it and its potential energy are respectively

Choices

Choice (4) Response

a.

2q. E and minimum

b.

are zero

c.

q. E and pE

d.

q. E and pE

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