NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 240 - 243 of 2184

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Question number: 240

» Electrostatics » Electrostatic Potential Energy

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MCQ▾

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: 241

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

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MCQ▾

Question

A student performs an experiment for determination of . The error in length is ∆ and in time T is ∆ T and n is number of times the reading is taken. The measurement of g is most accurate for

Choices

Choice (4) Response

a.

∆l = 5mn, ∆ T = 0.2 sec, n = 10

b.

∆l = 5mn, ∆T = 0.2 sec, n = 20

c.

∆l = 5mn, ∆T = 0.1 sec, n = 10

d.

∆l = 1mn, ∆T = 0.1 sec, n = 50

Question number: 242

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

Two bodies P and Q are moving along positive x-axis their position-time graph is shown below. If VPQ is velocity of P w. r. t. Q and VQP is velocity of Q w. r. t P, then

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

(1)

(2)

(3)

(4)

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1,2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 243

» Electrostatics » Equipotential Surfaces

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MCQ▾

Question

In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done by electric force is

 Image of a equipotential sphere

Image of a Equipotential Sphere

A, B, C, D, E are on the equipotential sphere. +q point charge placed at the center of the sphere.

Choices

Choice (4) Response

a.

Least along AE

b.

Least along the path AB

c.

Zero along all the paths AB,

d.

Least along the path AD