NEET Physics: Questions 240 - 243 of 2099

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Question number: 240

» Electrostatics » Electrostatic Potential Energy

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.

2eV

b.

2 J

c.

4 J

d.

0.036 J

Question number: 241

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

MCQ▾

Question

A student performs an experiment for determination of g=(4π2lT2) . 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

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) (VPQ)=(VQP)=constant

(2) VPQtowardsorigin

(3) VQPtowardsorigin

(4) (VPQ)(VQP)=constant

Choices

Choice (4) Response
a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 243

» Electrostatics » Equipotential Surfaces

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.

Zero along all the paths AB,

b.

Least along AE

c.

Least along the path AD

d.

Least along the path AB

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