Below Electrostatics quiz are Multiple Choice Questions (MCQs) type Quiz. These Electrostatics MCQ Questions helps you to refresh your Electrostatics, you can see the correct option by clicking on it. .
1. In equation Q=CV, C is constant of proportionality called capacitor's
2. If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
friction destroyed electrons in the rod.
the silk has become negatively charged.
protons have moved to the rod.
glass attracts more protons.
3. 3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in series combination with a battery of 5V, as 1µF = 10-6F, the voltage across each capacitor is
1.96V, 1.63V, 1.4V
2.1V, 2.5V, 2.8V
0.5V, 0.9V, 0.8V
3.6V, 3.8V, 3.9V
4. During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...
the plastic strip acquired extra protons from the cotton.
the plastic strip acquired extra protons from the charging process
protons were created as the result of the charging process
the plastic strip lost electrons to the cotton during the charging process
5. An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres?
doubling q on both spheres while halving r
doubling q on one sphere while halving r
doubling q on one sphere while doubling r
doubling q on both spheres while doubling r
6. A charged balloon is brought near an electroscope but DOES NOT touch the electroscope. This is an example of charging by
7. The ability of a capacitor to store charge depends upon
area of plates
distance between plates
type of dielectric used
all of above
8. In electrostatic air cleaner, air mixed with dust and pollen enters device across
positively charged mesh
negatively charged mesh
dual charged mesh
9. When you charge a balloon by rubbing it on your hair this is an example of what method of charging?
10. Coulomb's law is only true for point charges whose sizes are
11. A 2 C charge experiences a force of 40 N when put at a certain location in space. The electric field at that location is..
12. Two similar metal spheres, A and B, have charges of +2.0 x 10-6 coulomb and +1.0 x 10-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.0N newtons. What is the magnitude of the electrostatic force on B due to A?
13. In a good insulator, electrons are usually
free to move around
free to move around after an impurity has been added
semi-free to move around
tightly bound in place
14. Three charged metal spheres, X, Y, and Z, are on insulating stands. All three spheres are simultaneously brought into contact with each other and then returned to their original positions. Which statement best describes the charge of the spheres after this procedure is completed?
All the spheres will end up with the same charge
All the spheres are neutral
Sphere Y has a greater charge than spheres X or Z
Each sphere retains the same charge that it had originally
15. The ability of a capacitor to store charge is affected by
area of the plates
distance between the plates
type of insulators used
all of above
16. Insulators are different than conductors in that insulators ____.
do not contain electrons or protons
do not contain any charge
have a weaker affinity for electrons
do not allow charge to freely move
17. Only the __ move to create unbalanced charges.
18. A negatively charged plastic comb is brought close to, but does not touch, a small piece of paper. If the comb and the paper are attracted to each other, the charge on the paper
must be positive
must be negative
may be neutral or negative
may be neutral or positive
19. Metal sphere A has a charge of +12 elementary charges and identical sphere B has a charge of +16 elementary charges. After the two spheres are brought into contact and separated, the charge on sphere A is
+14 elementary charges
+28 elementary charges
+2 elementary charges
-2 elementary charges
20. Neutral atoms contain equal numbers of positive __ and negative __.
Electrons and Protons
Protons and Electrons
Neutrons and Electrons
Protons and Neutrons
21. Which net charge could be found on an object?
4.8 x 10-19 C
1.8 x 10-19 C
3.0 x 10-19 C
2.8 x 10-19 C
22. Due to electrostatic induction in aluminum rod due to charged plastic rod, the total charge on the aluminum rod is
23. If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
24. Dielectric strength of mica is
10 to 20 kV/mm
30 to 50 kV/mm
50 to 200 kV/mm
300 to 500 kV/mm
25. Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
1.5E-11 N attracted
2.5E-11 N repelled
2.5E11 N attracted
7.5E-10 N attracted
26. The coulomb's force between the 2 point charges 10µC and 5µC placed at a distance of 150cm is
27. If F is the force acting on the test charge qo, the electric field intensity E would be given by
E = F - qo
E = F/qo
E = F + qo
E = qo/F
28. If one unit of charge given to the plates of a capacitor produces a potential difference of 1 volt between the plates of the capacitor then its capacitance would be
29. Compared to insulators, metals are better conductors of electricity because metals contain more free
30. SI unit of electric potential is
31. SI unit of capacitance is
32. SI unit of electric intensity is
33. The SI unit of electric potential is
34. Electroscope can be charged by
all of above
35. Plastic rod rubbed with fur and glass rod rubbed with silk
repel each other
mix up with each other
attract each other
none of above
36. Which of the following materials has the highest value of dielectric constant?
37. Dielectric strength of medium
increases with rise in temperature
increases with moisture content
is same for all insulating materials
none of the above
38. The dissipation factor of a good dielectric is of the order of
39. In a capacitive circuit
a steady value of applied voltage causes discharge
an increase in applied voltage makes a capacitor charge
decrease in applied voltage makes a capacitor charge