10th class Physics unit 4 MCQs
chapter 4 MCQs 10th Class Physics
Electrostatics:
1. A positive electric charge:
a. Attracts a neutral charge
b. Attracts other positive charge
c. Repels a neutral charge
d. Repels other positive charge
2. Types of charges are:
a. Four
b. Two
c. Five
d. Three
3. ectrostatics is the study of charges ………:
a. In uniform motion
b. In motion
c. At a certain height
d. At rest
4. When we rub a surface on another surface, we produce ………:
a. Energy
b. Friction
c. Power
d. Heat
5. Same charges ……… each other:
a. Do not exert any force
b. Attract
c. Repel
d. None
6. Unlike charges ……… each other:
a. Do not exert any force
b. Attract
c. Repel
d. None
7. We can produce opposite charges on different bodies by:
a. Drying
b. Force
c. Rotating
d. Rubbing
8. An object gains excess a negative charge after being rubbed against another object which is:
a. Positively charged
b. Neutral
c. Negatively charged
d. All of these
9. Charges produced during electrostatic induction on a body are:
a. Positive
b. Permanent
c. Negative
d. Temporary
10. Electrostatic induction takes place if we bring a ……… near a neutral body:
a. Neutral rod
b. Charged rod
c. Molecules
d. Metal rod
11. Electroscope is used to detect:
a. Voltage
b. Current
c. Resistance
d. Charge
12. Which instrument is used to find the nature of the charge?
a. Spectroscope
b. Stroboscope
c. Microscope
d. Electroscope
13. A thin foil made of ……… is connected to the ground in order to protect the gold foils of electroscope from external electrical disturbance:
a. Brass
b. Aluminum
c. Silver
d. Copper
14. The device which is used to detect charges is called:
a. Spectroscope
b. Stroboscope
c. Microscope
d. Electroscope
15. Electroscope can be charged by the process called:
a. Electric potential
b. Electromagnet induction
c. Coulomb’s law
d. Electrostatic induction
16. According to Coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases?
a. Remains unchanged
b. Increases
c. Cannot be determined
d. Decreases
17. The Coulomb’s law is valid for the charges which are
a. Stationary and point charges
b. Moving and point charges
c. Stationary and large size charges
d. Moving and non-point charges
18. A positive and a negative charge are initially 4cm apart. When they are moved closer together so that they are now only 1cm apart, the force between
them is
a. 8 times larger than before
b. 4 times smaller than before
c. 16 times larger than before
d. 4 times larger than before
19. Two small charged spheres are separated by 2mm. Which of the following would produce the greatest attractive force?
a. +2q and +2q
b. +1q and +4q
c. +2q and -2q
d. -1q and -4q
20. SI unit of electrical charge is:
a. Ohm
b. Ampere
c. Coulomb
d. Volt
21. The mathematical equation for Coulomb’s law is:
a. F = k q1q2/r
b. F = k q1q2/r3
c. F = k q1q2/r2
d. F = k q2q2/r2
22. The value of k in Coulomb’s law is:
a. 9 x 109 Nm2 C-2
b. 9 x 108 Nm2 C-2
c. 9 x 10-9 Nm2 C-2
d. 9 x 10-8 Nm2 C-2
23. Two charged spheres are placed at a distance of 2mm, which of the following pair has the more attractive force?
a. +2q and +2q
b. +1q and +4q
c. +2q and -2q
d. -1q and -4q
24. The unit of Coulomb’s constant in SI is:
a. Nm-2 C-2
b. Nm2 C-2
c. Nm-2 C2
d. Nm2 C2
25. In system international, the value of k in the presence of space or air between two charges:
a. 9 x 1018Nm2C-2
b. 9 x 109Nm2C-2
c. 9 x 10-18Nm2C-2
d. 9 x 10-9Nm2C-2
26. One micro coulomb is equal to:
a. 10-6C
b. 10-3C
c. 106C
d. 103C
27. Coulomb’s law was introduced in:
a. 1985
b. 1785
c. 1685
d. 1885
28. The Coulomb’s force is directly proportional to:
a. Product of both charges
b. First charge
c. Distance between charges
d. Second charge
29. The Coulomb’s force is inversely proportional to:
a. Product of both charges
b. First charge
c. Distance between charges
d. Second charge
30. Electric field lines are always:
a. Pass each other in a region of more field
b. Can pass each other
c. Pass each other in a region of less field
d. Cannot pass each other
31. The intensity of electric field at any point in space is called:
a. Electric field intensity
b. Electric field lines
c. Electric potential
d. Electrostatic induction
32. The equation of electric intensity is:
a. E = F/q
b. E = q/F
c. F = − Eq
d. q = EF
33. The unit of electric intensity is:
a. NC-1
b. Watt
c. Nm
d. Ns-1
34. The unit of electric field intensity is:
a. NC-1
b. NC
c. N2 C-1
d. NC-2
35. The direction of electric field lines is always:
a. From positive to middle
b. From negative to positive
c. From negative to middle
d. From positive to negative
36. The electric field lines have ……… directions:
a. Three
b. One
c. Four
d. Tow
37. The charge on electric field lines is:
a. Zero
b. Same
c. None
d. Opposite
38. The electric field lines of an isolated positive charge acts:
a. In the direction of tangent
b. Inward
c. Upward
d. Outward
39. The electric field lines of an isolated negative charge acts:
a. In the direction of tangent
b. Inward
c. Upward
d. Outward
40. Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is:
a. 5V
b. 0.5V
c. 10V
d. 2V
42. One volt is equal to:
a. 1 JC-1
b. 1 JC
c. 1 C-1
d. 1 J
43. The formula for electrostatic potential is:
a. V = Wq
b. V = W/q
c. W = qR
d. V = q/W
44. Electric potential is a ……… quantity:
a. Derived
b. Scalar
c. Similar
d. Vector
45. Capacitance is defined as
a. QV
b. VC
c. V/Q
d. Q/V
46. Capacitor is used to store:
a. Resistance
b. Current
c. Charge
d. All of the above
47. Charge storing device is:
a. Dielectric
b. Resistor
c. Fuse
d. Capacitor
48. The SI unit of capacitance is:
a. Coulomb
b. Volt
c. Farad
d. Ampere
49. The definition of capacitance is:
a. Q/V
b. VC
c. V/Q
d. Q/V
50. The methods of combination of capacitors are:
a. Four
b. Two
c. Five
d. Three
51. In parallel combination, each capacitor has the same value of:
a. Capacitance
b. Voltage
c. Charge and capacitance
d. Charge
52. If 2 volts is stored in a capacitor when 4 C charge is given to the plates then its capacitance will be:
a. 6 F
b. 2 F
c. 8 F
d. 4 F
53. In circuits, ……… allows AC current to pass but stops DC current:
a. Specific resistance
b. Capacitor
c. Thermometer
d. Resistance
54. One nano Farad is equal to:
a. 1 x 10-12 F
b. 1 x 10-6 F
c. 1 x 10-18 F
d. 1 x 10-9 F
55. Capacitor is used to differentiate between high frequency and low frequency. This circuit is called:
a. Filter circuit
b. Series circuit
c. Parallel circuit
d. None of the above
56. Micro Farad means:
a. 10-9 F
b. 10-3 F
c. 10-12 F
d. 10-6 F
57. The medium used in the plates of capacitor is called:
a. Dielectric
b. Insulator
c. Metal
d. Conductor
58. The charge storing capacity of a capacitor is called:
a. Electric potential
b. Resistance
c. Electric energy
d. Capacitance
59. In Mica capacitor, ……… dielectric is used:
a. Paper
b. Plastic
c. Mica
d. Aluminium
60. An example of fixed capacitor is:
a. Round capacitor
b. Mica capacitor
c. Paper capacitor
d. Variable capacitor
61. The dielectric used in paper capacitor is:
a. Plastic sheet
b. Greased paper
c. Oiled paper
d. All
62. The dielectric used in variable capacitor is:
a. Air
b. Oiled paper
c. Greased paper
d. Plastic
63. The capacitors which are used for tuning in radio sets are called:
a. Variable capacitors
b. Mica capacitors
c. Fixed capacitors
d. Paper capacitors
64. The capacitors which are superior for all applications are:
a. Variable capacitors
b. Mica capacitors
c. Ceramic capacitors
d. Paper capacitors
65. Each bolt of lightening contains about:
a. 1000 million joule energy
b. 2000 million joule energy
c. 4000 million joule energy
d. 3000 million joule energy
66. Which of the following is an application of electrostatics?
a. Photocopying
b. Car painting
c. Extracting dust
d. All
67. The air cleaner works on the principle of:
a. Capacitors
b. Electrostatics
c. Electric potential
d. Electromagnetic induction
68. Car painting is an application of:
a. Capacitors
b. Electrostatics
c. Electric potential
d. Electromagnetic induction
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