Electrostatics (KVPY Stream-SA (Class 11) Physics): Questions 1 - 4 of 14

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Question number: 1

» Electrostatics » Forces Between Two Point Charges

Appeared in Year: 2010

MCQ▾

Question

positive charges of magnitude q are placed on a circle of radius R in a manner that they are equally spaced. A charge Q is placed at the center. If one of the charges q is removed, then the force on Q is

Choices

Choice (4) Response

a.

qQ4πϵ0R2 away from the position of the removed charge

b.

11qQ4πϵ0R2 away from the position of the removed charge

c.

qQ4πϵ0R2 towards the position of the removed charge

d.

Zero

Question number: 2

» Electrostatics » Electric Charges

Appeared in Year: 2012

MCQ▾

Question

A girl brings a positively charged rod near a thin neutral stream of water from a tap. She observes that the water stream bends towards her. Instead, if she were to bring a negatively charged rod near to the stream, it will:

Choices

Choice (4) Response

a.

bend in the opposite direction above and below the rod

b.

not bend at all

c.

bend in the same direction

d.

bend in the opposite direction

Question number: 3

» Electrostatics » Electrostatic Potential Energy

Appeared in Year: 2014

MCQ▾

Question

Two equal charges of magnitude Q each are placed at a distance d apart. Their electrostatic energy is E. A third charge Q2 is brought midway between these two charges. The electrostatic energy of the system is now

Choices

Choice (4) Response

a.

E

b.

-2E

c.

-E

d.

0

Question number: 4

» Electrostatics » Electric Potential

Appeared in Year: 2013

MCQ▾

Question

An electron with an initial speed of 4.0 × 106 ms-1 is brought to rest by an electric field. The mass and charge of an electron are 9 × 10-31 kg and 1.6 × 10-19 C, respectively. Identify the correct statement.

Choices

Choice (4) Response

a.

The electron moves from a region of lower potential to higher potential through a potential difference of 45 V.

b.

The electron moves from a region of higher potential to lower potential through a potential difference of 45 V.

c.

The electron moves from a region of lower potential to higher potential through a potential difference of 11.4 μV.

d.

The electron moves from a region of higher potential to lower potential through a potential difference of 11.4 μV.

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