NEET Physics: Questions 429 - 432 of 2099

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 429

» 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.

F3

c.

F2

d.

2F

Question number: 430

» Kinematics » Average Speed and Instantaneous Velocity

Assertion-Reason▾

Assertion (Ꭺ)

A river is flowing from east to west at a speed of 5m/min. A man on south bank of river, capable of swimming 10 m/min in still water, wants to swim across the river in shortest time. He should swim due north.

Reason (Ꭱ)

For the shortest time the man needs to swim perpendicular to the bank.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are false

Question number: 431

» 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: 432

» 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.

2q2+21

b.

2q2+2

c.

2q

d.

q1+2

Sign In