MCQ Electric Field, Class 12 Physics

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. The field lines for single positive charge are:

Parallel

Radiating inwards

Circular

Radiating outwards

Question 1 of 20

2. Which of the following statement is true?

Electric field lines intersect with each other.

Electric field lines for single positive charge are radiated inwards.

Electric field lines start from negative charge

Electric field lines do not form closed loops.

Question 2 of 20

3. The electric field and force experienced by a test charge placed at origin is 6 x 10⁵ N/C and 18 x 10^-4 N. The value of test charge is:

12nC

6nC

9nC

3nC

Question 3 of 20

4. Two point charges 2μC and 8μC are placed 12cm apart. The position of point from 2μC charge, where the electric field intensity is zero is:

4 cm

12 cm

2 cm

8 cm

Question 4 of 20

5. Two point charges QA = 2 μ C and QA = -2 μC located 16 cm apart in vacuum. What is the electric field at the mid point O of the line AB joining the two charges?

E = 6.5 mega N/C along OA

E = 6.5 mega N/C along OB

E = 5.6 mega N/C along OB

E = 5.6 mega N/C along OA

Question 5 of 20

6. An electron initially at rest is accelerated through a potential difference of 1 V. The energy gained by the electron is:

1 J

10^-19J

1.6 × 10^-19 J

None of these

Question 6 of 20

7. Electric field intensity varies with distance as:

A

B

C

D

Question 7 of 20

8. If electric field lines cross each other that would mean

the electric field can be in either of the two directions.

the direction of the field changes at that point

two directions for the electric field at one point which is not possible.

the resultant electric field at a point is zero

Question 8 of 20

9. The S.I. unit of electric field intensity is:

NC^-1

NC

N^-1C

None of the above

Question 9 of 20

10. The diagram shows the electric field lines in a region of space containing two small charged spheres, Y and Z then which statement is true?

Magnitude of electric field is same everywhere

Y is negative & Z is positive

Y and Z must have the same sign

A small negatively charged body placed at X would be pushed to the right

Question 10 of 20

11. Which equation correctly shows the force on a charge q in an electric field E:

A

B

C

D

Question 11 of 20

12. A test charge of 3nC is placed at origin and experiences a force of 9 x 10^-4 N. The electric field at origin is:

0.3 x 10⁵ N/C

9 x 10⁵ N/C

3 x 10⁵ N/C

1 x 10⁵ N/C

Question 12 of 20

13. The field lines for single negative charge are:

Radiating outwards

Radiated inwards

Parallel

Spheres concentric with charge

Question 13 of 20

14. Electric flux of a surface is maximum, when

Surface area is zero.

Electric field is zero.

area vector is perpendicular to the direction of electric field.

area vector is parallel to the direction of electric field.

Question 14 of 20

15. SI unit electric field and electric force are

N/C for both

N/C and N

N for both

N and N/C

Question 15 of 20

16. For uniform electric field, field lines are:

Divergent

Convergent

Parallel and equally spaced

Convergent then divergent

Question 16 of 20

17. An electron traveling north enters a region where the electric field is uniform and points North.
The electron:

Slows down

Move towards East

Speeds up

Continues with the same speed in the same direction

Question 17 of 20

18. The magnitude of an electric field balancing a deutron of charge 1.6 x 10^-19 C and mass 3.2 x 10^-27 kg is:

A

B

C

D

Question 18 of 20

19. Electric field of a point charge extends up to r where 1/r is

one

infinity

Zero

two

Question 19 of 20

20. An electric dipole consists of a positive and negative charge of 4 micro C. Each placed at a distance of 5 mm. The dipole moment for the system is

2 x 10^-9 C-m

2 x 10^-8 C-m

20 x 10^-8 C-m

1 x 10^-8 C-m

Question 20 of 20

 Loading...