Electrostatics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 86 - 90 of 109

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Question number: 86

» Electrostatics » Equipotential Surfaces

MCQ▾

Question

A uniform electric field pointing in positive x - direction exists in a region. Let A be the origin, B be the point on the x - axis at x =+1 cm and C be the point on the y - axis at y =+1 cm. Then the potentials at the points A, B and C satisfy

Choices

Choice (4) Response

a.

V A < V B

b.

V A > V C

c.

V A < V C

d.

V A > V B

Question number: 87

» Electrostatics » Electric Charges

Assertion-Reason▾

Assertion (Ꭺ)

Electrons move away from a low potential to high potential region.

Reason (Ꭱ)

because electrons have negative charge

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 88

» Electrostatics » Capacitors

MCQ▾

Question

Two capacitors of capacitances 3µF and 6µFare charged to a potential of 12V each. They are now connected to each other, with the positive plate of each joined to the negative plate of the other. The potential difference across each will be

Choices

Choice (4) Response

a.

6 volt

b.

zero

c.

4 volt

d.

3 volt

Question number: 89

» Electrostatics » Torque on a Dipole in a Uniform Electric Field.

MCQ▾

Question

Electric charges q, q, -2q are placed at the corners of an equilateral triangle ABC of side l. The magnitude of electric dipole moment of the system is

Choices

Choice (4) Response

a.

b.

2ql

c.

4q l

d.

ql

Question number: 90

» Electrostatics » Coulomb's Law

MCQ▾

Question

The charges on two spheres are + 7 μ C and -5 μ C respectively. They experience a force F. If each of them is given an additional charge of -2 μ C, the new force of attraction will be

Choices

Choice (4) Response

a.

F

b.

c.

d.

2F

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