Electrostatics-Electrostatic Potential Energy (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 17

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Question number: 1

» Electrostatics » Electrostatic Potential Energy

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Question

Two identical charges are placed at the two corners of an equilateral triangle. The potential energy of the system is U. The work done in bringing an identical charge from Infinity to the third vertex is

Choices

Choice (4) Response

a.

zero

b.

U

c.

3U

d.

2U

Question number: 2

» Electrostatics » Electrostatic Potential Energy

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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 along the direction of the field, the force on it and its potential energy are respectively

Choices

Choice (4) Response

a.

q. E and p. E

b.

q. E and maximum

c.

2q. E and minimum

d.

Zero and minimum

Question number: 3

» Electrostatics » Electrostatic Potential Energy

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Question

Two equal negative point charges 2µC place1 m apart from each other in air. so what is the potential energy of the system?

Choices

Choice (4) Response

a.

4 J

b.

0.036 J

c.

2 J

d.

2eV

Question number: 4

» Electrostatics » Electrostatic Potential Energy

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MCQ▾

Question

Charges -q, Q and -q are placed at equal distance on a straight line. If the total potential energy of the system of three charges is zero, then find the ratio Q/q.

Three charge system placed at equal distance

Three Charge System Placed at Equal Distance

Charges -q, Q and -q are placed at equal distance (r) on a straight line.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 5

» Electrostatics » Electrostatic Potential Energy

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MCQ▾

Question

As shown in figure a dust particle with mass m = 5.010 -9 kg and charge q 0 = 2.0 nC starts from rest at point a and moves in a straight line to point b. What is its speed v at point b?

Movement of dust particle from rest in straight line

Movement of Dust Particle from Rest in Straight Line

In figure a dust particle with mass m = 5.0×10-9 kg and charge q0 = 2.0 nC starts from rest at point a and moves in a straight line to point b. At the end points of lines two charges + 3 nC and -3 nC placed.

Choices

Choice (4) Response

a.

34 ms -1

b.

14 ms -1

c.

46 ms -1

d.

26 ms -1

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