- This Mock test contains 20 MCQ questions.
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- Determine the one correct answer out of the four available options given for each question.
- Each question awards you 1 point.
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Question 1 of 20
1. Question1 point(s)
Gap between two electrodes of the spark-plug used in an automobile engine is 1.25 mm. If the potential of 20 V is applied across the gap, what will be the magnitude of electric field between the electrodes?CorrectIncorrect
Question 2 of 20
2. Question1 point(s)
An electron is placed between two parallel plates connected to a battery. If the battery is switched on, the electron willCorrectIncorrect
Question 3 of 20
3. Question1 point(s)
A charge of + 7 µC is placed at the centre of two concentric spheres with radius 2.0 cm and 4.0 cm respectively. The ratio of the flux through them will beCorrectIncorrect
Question 4 of 20
4. Question1 point(s)
Two charges of 1.0 C each are placed one meter apart in free space. The force between them will beCorrectIncorrect
Question 5 of 20
5. Question1 point(s)
Two point charges of +5 µC are so placed that they experience a force of 80×10-³ N. They are then moved apart, so that the force is now 2.0×10-³ N. The distance between them is nowCorrectIncorrect
Question 6 of 20
6. Question1 point(s)
A metallic sphere A isolated from ground is charged to +50 µC. This sphere is brought in contact with other isolated metallic sphere B of half the radius of sphere A. The charge on the two sphere will be now in the ratioCorrectIncorrect
Question 7 of 20
7. Question1 point(s)
Which of the following produces uniform electric field?CorrectIncorrect
Question 8 of 20
8. Question1 point(s)
Two point charges of A = +5.0 µC and B = -5.0 µC are separated by 5.0 cm. A point charge C = 1.0 µC is placed
at 3.0 cm away from the centre on the perpendicular bisector of the line joining the two point charges. The charge at C will experience a force directed towardsCorrectIncorrect
Question 9 of 20
9. Question1 point(s)
Two small spheres 18 cm apart have equal negative charges and repel each other with the force of 6×10-³ N. Find the total charge on both spheresCorrectIncorrect
Question 10 of 20
10. Question1 point(s)
A charge +q exerts a force of magnitude -0.2 N on another charge -2q. If they are separated by 25.0 cm, determine the value of qCorrectIncorrect
Question 11 of 20
11. Question1 point(s)
Four charges of + 6×10-8 C each are placed at the corners of a square whose sides a are 3 cm each. Calculate the
resultant force on each chargeCorrectIncorrect
Question 12 of 20
12. Question1 point(s)
Calculate the electric field due to a charge of -8.0×10^-8 C at a distance of 5.0 cm from it.CorrectIncorrect
Question 13 of 20
13. Question1 point(s)
Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surface of spheres A and B isCorrectIncorrect
Question 14 of 20
14. Question1 point(s)
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then theCorrectIncorrect
Question 15 of 20
15. Question1 point(s)
A particle of mass m and charge q is placed at rest in a uniform electric field E and then released. The kinetic energy attend by the particle after moving a distance y isCorrectIncorrect
Question 16 of 20
16. Question1 point(s)
A charge of 5.0 C is kept at the centre of a sphere of radius 1 m. What is the flux passing through the sphere?CorrectIncorrect
Question 17 of 20
17. Question1 point(s)
Charge on an electron is 1.6×10^-19 C. How many electrons are required to accumulate a charge of one coulomb?CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
An electric dipole is placed at an angle of 30° with an electric field intensity 2 × 105 N/C. It experiences a torque equal to 4 N m. The charge on the dipole, if the dipole length is 2 cm, isCorrectIncorrect
Question 19 of 20
19. Question1 point(s)
A, B and C are three points in a uniform electric field. The electric potential isCorrectIncorrect
Question 20 of 20
20. Question1 point(s)
Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of 30° with each other. When suspended in a liquid of density 0.8 g cm–3, the angle remains the same. If density of the material of the sphere is 1.6 g cm–3, the dielectric constant of the liquid isCorrectIncorrect