In this article, we are going to give you the Most Useful FPSC Physics MCQs with answers, These are the Physics Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of different universities of Pakistan. These FPSC Physics MCQs will help the students to get higher marks in physics subject.

## FPSC Physics MCQs

1. The area under the force displacement graph represents?

A. area
B. work done
C. power
D. none of these

2. Propulsion force of a rocket is?

A. non-conservative force
B. conservative force
C. both A and B
D. none of these

3. Geothermal energy is a source of energy?

A. non-renewable
B. stable
C. renewable
D. none of the above

4. cells convert solar energy into electrical energy?

A. rotary
B. photovoltaic
C. galvanic
D. none of these

5. Biomass can be converted into fuels by?

A. direct combustion
B. fermentation
C. both A and B
D. none of these

6. Which of the following substances possess the highest elasticity?

A. Rubber
B. Steel
C. Glass
D. Copper

7. What are the dimensions of stress?

A. MLT-2
B. ML-2T-1
C. ML-1T-2
D. ML-T-1

8. Which one of the following physical quantities does not have the dimensions of force per unit area?

A. Stress
B. Strain
C. Youngs modulus
D. Pressure

9. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is?

A. FE
B. (FE)
C. FE2/L
D. FE2

10. When a force is applied at one end of an elastic wire it produces at strain in the wire. If y is the Youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by?

A. Y∝
B. 2Y∝
C. Y∝/2
D. Y2

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11. A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire?

A. 0.01J
B. 0.02J
C. 0.04J
D. 1.0J

12. A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by?

A. Stress/strain
B. (stress/strain)
C. Stress x strain
D. (Stress / strain)

13. The ration stress to strain in Youngs modulus of the material then tension is?

A. Directly proportional to extension
B. Directly proportional to strain
C. Directly proportional to square of amplitude
D. Inversely proportional to extension

14. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is?

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A. The extension of the wire is proportional to the force applied
B. The weight of the wire is negligible
C. The wire is not stretched beyond its elastic limit
D. The cross-sectional area of the wire remains constant

15. Formation of large molecule by joining small molecules is?

A. Fusion
B. Polymerization
C. Crystallization
D. Subtraction

16. The energy band occupied by the valence electrons is called?

A. Energy state
B. Valence band
C. -VE energy state
D. conduction band

17. A ferromagnet will become fully magnetized at?

A. High voltage A.C
B. Low voltage A.C
C. Alternating current at its peak value
D. D.C current at peak value

18. Materials in which valence electrons are tightly bound to their atoms at low temperature are called?

A. Semi-conductor
B. Super conductors
C. Insulators
D. Conductor

19. The angular position of cells remains the same for a sample of a crystal. This property is called?

A. Isotropy
B. Cleavage
C. Homogeneity
D. The external symmetry of form

20. If the density of atoms remain same along any direction in a crystal is called?

A. Symmetry
B. Homogeneity
C. Isotropy
D. Cleavage

21. The band theory of solids explains satisfactorily the nature of?

A. Electrical insulators alone
B. Electrical conductors alone
C. Electrical semi-conductors alone
D. All of the above

22. A completely filled band is called?

A. Conduction band
B. Valence band
C. Forbidden band
D. Core band

23. Which one has the greatest energy gap?

A. Semi-conductor
B. Conductor
C. Metals
D. Non metals

24. With increase in temperature the electrical conductivity of intrinsic semi-conductor?

A. Decreases
B. Increases
C. Remains same
D. First increases then decreases

25. On the basis of band theory of solids the semi-conductors have?

A. A party filled valence band and totally empty conduction band
B. A completely filled valence band a totally empty conduction band and a very wide forbidden band
C. A completely filled valence band a partially filled conduction band and a narrow-forbidden band
D. A partly filled valence band a totally empty conduction band and a wide forbidden band

26. Very weak magnetic fields are detected by?

A. Squids
B. Magnetic resonance imaging (MRI)
C. Magnetometer
D. Oscilloscope

27. Energy needed to magnetize and demagnetize is represented by?

A. Hysteresis curve
B. Hysteresis loop area
C. Hysteresis loop
D. Straight line

28. What is the SI unit of modulus of elasticity of substance?

A. Nm-2
B. Jm-2
C. Nm-1
D. Being a number it has no unit.

29. A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the Youngs modulus of rubber?

A. 2×108 Nm-2
B. 5×106 Nm-2
C. 0.5×10-6 Nm-2
D. 0.2×10-6Nm-2

30. A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the Youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is?

A. 0.025J
B. 0.50J
C. 0.75J
D. 0.100J

31. Materials that undergo plastic deformation before breaking are called?

A. Brittle
B. Ductile
C. Amorphous
D. Polymers

32. A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is?

A. (F1+F2) (121+122)
B. (F1+F2) (122-112)
C. (F1+F2) (12-11)
D. (F1+F2) (12-11)

33. Any alteration produced in shapes length or volume when a body is subjected to some external force is called?

A. Stiffness
B. Toughness
C. Extension
D. Deformation

34. The curie temperature is that at which?

A. Semi-conductor becomes conductors
B. Ferromagnetic becomes paramagnetic
C. Paramagnetic becomes diamagnetic
D. Metals become super conductor

35. Coercive force is the force which opposes?

A. Demagnetization
B. Breakage
C. Extension
D. Surface cracking

36. The bulk properties of materials such as their mode of fracture can be related to their?

A. Polymerization
B. Cleavage
C. Microstructure
D. Dislocation

37. The breaking of crystals along definite direction is called?

A. Cleavage
B. Symmetry
C. Isotropy
D. Homogeneity

38. In simple cube one atom or molecule lies at its?

A. Force corners
B. Nine corners
C. Eight corners
D. Six corners

39. A vacant or partially filled band is called?

A. Conduction band
B. Valence band
C. Forbidden band
D. Empty band

40. The electrons in conduction band are free to?

A. Transport vibrations
B. Transport signals
C. Transport charge
D. Transport impulses

41. Many of the semi-conductors are crystals of the type?

A. Face centered cubic
B. Body centered cubic
C. Simple cubic
D. All of the above

42. Holes can exist in?

A. Conductors
B. Insulators
C. Semi-conductors
D. All of the above

43. In a semi-conductor the charge carriers are?

A. Holes only
B. Electrons only
C. Electron and holes both
D. All of the above

44. The net charge on n-type material is?

A. Positive
B. Negative
C. Both positive and negative
D. Neutral

45. Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called?

A. magnetic flux
B. magnetic field intensity
C. magnetic induction
D. self-inductance

46. What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N?

A. 1A
B. 10A
C. 100A
D. 1000A

47. Two parallel wires carrying currents in the opposite directions?

A. repel each other
B. attract each other
C. have no effect upon each other
D. they cancel out their individual magnetic fields

48. A magnetic field?

A. always exerts a force on a charged particle
B. never exerts a force on a charged-particles
C. exerts a force if the charged particle is moving in the direction of the magnetic field lines
D. exerts a force if the charged particle is moving perpendicular to the magnetic field lines

49. Which one of the following materials is most suitable for making core of an electromagnet?

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A. air
B. steel
C. Cu-Ni alloy
D. soft iron

50. The relationship between Tesla and smaller unit Gauss of magnetic induction is given by?

A. 1T = 103 G
B. 1T = 10-4 G
C. 1T = 10-2 G
D. 1T = 104 G

51. SI unit of flux density is?

A. NA-1m-1
B. NAm-1
C. NmA-1
D. NmA-2

52. The standard vector symbol for flux density is ?

A. M
B. L
C. H
D. B

53. An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if?

A. E = BeV
B. B = eE/V
C. E = BV
D. E = BeV/2

54. n instrument which can measure potential without drawing any current is?

A. voltmeter
B. galvanometer
C. cathode ray oscilloscope (CRO)
D. ammeter

55. When the coil of the galvanometer is in equilibrium then the deflecting couple is?

A. zero
B. equal to the restoring couple
C. greater than the restoring couple
D. smaller than the restoring couple

56. Which one of the following is not an electromechanical instrument?

A. galvanometer
B. voltmeter
C. ammeter
D. AC transformer and DC generator

57. In a multi range ammeter as the range increases?

A. shunt value decreases
B. shunt value increases
C. shunt value remains the same
D. none of the above

58. A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is?

A. 2.0 mA
B. 20 mA
C. 200 mA
D. 0.2 mA

59. Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always?

A. BINA cosa
B. BINA sina
C. BINA tana
D. BINA

60. A galvanometer basically is an instrument used to?

A. detect current in a circuit
B. measure current flowing through a circuit
C. measure voltage across a circuit
D. measure potential difference between two points in a circuit

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