ELECTROSTATICS (XII)

ELECTROSTATICS (XII)

12th Grade - University

40 Qs

quiz-placeholder

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ELECTROSTATICS (XII)

ELECTROSTATICS (XII)

Assessment

Quiz

Physics

12th Grade - University

Practice Problem

Hard

Created by

ALKA GUPTA

Used 12+ times

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40 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

1. Force of attraction between two point charges Q and – Q separated by d is F . When these charges are placed on two identical spheres of radius R=0.3d whose centres are distance d apart, the force of attraction between them is

Greater than F

EQUAL TO F

Less than F

INITIALLY Less than F THEN FINALLY EQUAL TO F

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

2. One metallic sphere A is given positive charge whereas another identical metallic sphere B of exactly same mass as of A is given equal amount of negative charge. Then

(a) Mass of A and mass of B still remain equal

(b) Mass of increases A

(c) Mass of decreases B

(d) Mass of increases B

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Four metal conductors having different shapes

1. A sphere 2. Cylindrical

3. Pear 3. Lightning conductor

are mounted on insulating stands and charged. The one which is best suited to retain the charges for a longer time is

1

2

3

4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium, if q is equal to

Q2-\frac{Q}{2}

Q4-\frac{Q}{4}

+Q4+\frac{Q}{4}

+Q2+\frac{Q}{2}

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 The electric potential V at any point O (x, y, z all in metres) in space is given by V= 4 X2X^2    . The electric field at the point (1,0,2)  in volt/m  is

8 along negative  X axis

8 along positive X  axis

16 along negative  X axis

16 along positive X axis

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10 V. The potential at the centre of the sphere is

0V

10V

Same as at point 10 cm away from the surface

Same as at point 25 cm away from the surface

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

If a unit positive charge is taken from one point to another over an equipotential surface, then

Work is done on the charge

Work is done by the charge

Work done is constant

No work is done

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