Electrostatics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 91 - 94 of 109

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Question number: 91

» Electrostatics » Forces Between Two Point Charges

MCQ▾

Question

A charged ball B hangs from a silk thread S, which makes an angle θ with a large charged conducting sheet P, as shown in the figure. The surface charge density a of the sheet is proportional to

A charged ball system

A Charged Ball System

A charged ball B hangs from a silk thread S, which makes an angle θ with a large charged conducting sheet P

Choices

Choice (4) Response

a.

Sin θ

b.

Cot θ

c.

Cos θ

d.

Tan θ

Question number: 92

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

Three charges Q , +q and +q are placed at the vertices of right-angled isosceles triangle as shown in the figure. The net electrostatic energy of the configuration is zero if Q is equal to

Right-angled isosceles triangle with 3 charges

Right-Angled Isosceles Triangle With 3 Charges

Q, +q, and + q charges placed at the vertices of right-angled isosceles triangle.

Choices

Choice (4) Response

a.

b.

c.

2q

d.

Question number: 93

» Electrostatics » Capacitors

MCQ▾

Question

The capacitance of a parallel plate condenser depends on

(1) Area of the plates

(2) Medium between the plates

(3) Distance between the plates

(4) Metal of the plates

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

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: 94

» Electrostatics » Capacitors

Assertion-Reason▾

Assertion (Ꭺ)

The force with which one plate of a parallel plate capacitor is attracted towards the other plate is equal to square of surface density per 2 0 per unit area.

Reason (Ꭱ)

The electric field due to one charged plate of the capacitor at the location of the other is equal to surface density per 2 0.

Choices

Choice (4) Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

Ꭺ is true but Ꭱ is false

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