✅ RRB Exam Physics MCQs (CBSE Class 10 Level) – Practice Set
MCQs (1–50)
1. The S.I. unit of electric current is:
A) Volt
B) Ampere
C) Ohm
D) Watt
2. A device used to measure electric current is:
A) Voltmeter
B) Ammeter
C) Galvanometer
D) Thermometer
3. The unit of resistance is:
A) Joule
B) Watt
C) Ohm
D) Coulomb
4. Ohm’s Law is represented by:
A) V = IR
B) P = VI
C) W = Fs
D) F = ma
5. The resistance of a conductor depends on:
A) Length
B) Area of cross-section
C) Material
D) All of these
6. The resistance of a wire increases when:
A) Length decreases
B) Length increases
C) Area increases
D) Temperature decreases
7. Which material is the best conductor?
A) Rubber
B) Glass
C) Copper
D) Wood
8. The power of an electric device is measured in:
A) Volt
B) Watt
C) Ohm
D) Ampere
9. Electric power formula is:
A) P = VI
B) P = IR
C) P = V/R
D) P = I/R
10. The commercial unit of electrical energy is:
A) Joule
B) Watt
C) Kilowatt hour
D) Coulomb
11. The lens used in a magnifying glass is:
A) Concave lens
B) Convex lens
C) Plane mirror
D) Concave mirror
12. A concave lens always forms:
A) Real image
B) Virtual image
C) Inverted image
D) Enlarged real image
13. The focal length of a convex lens is:
A) Positive
B) Negative
C) Zero
D) Infinite
14. Image formed by a plane mirror is:
A) Real and inverted
B) Virtual and erect
C) Real and erect
D) Virtual and inverted
15. Which mirror is used as a rear-view mirror in vehicles?
A) Plane mirror
B) Concave mirror
C) Convex mirror
D) Parabolic mirror
16. A convex mirror forms image that is:
A) Always real
B) Always virtual and diminished
C) Always real and inverted
D) Always virtual and magnified
17. The power of a lens is measured in:
A) Joule
B) Watt
C) Dioptre
D) Newton
18. A lens of focal length 50 cm has power:
A) +2D
B) +1D
C) -2D
D) -1D
19. A concave mirror can form:
A) Only real image
B) Only virtual image
C) Both real and virtual images
D) Only diminished image
20. Myopia (short-sightedness) is corrected using:
A) Convex lens
B) Concave lens
C) Cylindrical lens
D) Plane mirror
21. The splitting of white light into colours is called:
A) Reflection
B) Refraction
C) Dispersion
D) Diffusion
22. The speed of light is maximum in:
A) Water
B) Glass
C) Vacuum
D) Air
23. The refractive index of a medium depends on:
A) Wavelength
B) Nature of medium
C) Temperature
D) All of these
24. Bending of light when it enters another medium is:
A) Reflection
B) Refraction
C) Diffraction
D) Polarization
25. The phenomenon responsible for mirage is:
A) Total internal reflection
B) Diffraction
C) Scattering
D) Dispersion
26. A force that opposes motion is:
A) Gravity
B) Friction
C) Buoyancy
D) Magnetic force
27. The S.I unit of force is:
A) Newton
B) Joule
C) Pascal
D) Watt
28. Work is said to be done when:
A) Force is applied
B) Object moves without force
C) Force causes displacement
D) Force equals zero
29. S.I unit of work is:
A) Newton
B) Joule
C) Watt
D) Pascal
30. Power is defined as:
A) Work × time
B) Work / time
C) Force / time
D) Work × force
31. Gravitational force is:
A) Repulsive only
B) Attractive only
C) Both attractive and repulsive
D) Neither
32. The acceleration due to gravity on Earth is approximately:
A) 1.8 m/s²
B) 9.8 m/s²
C) 98 m/s²
D) 0.98 m/s²
33. Weight of an object is:
A) Constant everywhere
B) Mass × gravity
C) Mass only
D) Volume × density
34. The mass of an object:
A) Changes from place to place
B) Remains same everywhere
C) Depends on gravity
D) Depends on height
35. Free fall means:
A) Falling without friction and only under gravity
B) Falling in water
C) Falling with air resistance
D) Falling with acceleration zero
36. The magnetic field lines outside a magnet go from:
A) South to North
B) North to South
C) Both directions simultaneously
D) No direction
37. The device used to detect current in a circuit is:
A) Voltmeter
B) Galvanometer
C) Ammeter
D) Rheostat
38. Fleming’s Left Hand Rule is used for:
A) Generator
B) Motor
C) Transformer
D) Electromagnet
39. Fleming’s Right Hand Rule is used for:
A) Motor
B) Generator
C) Electric heater
D) Electric bulb
40. The phenomenon of producing current in a coil by changing magnetic field is:
A) Magnetism
B) Electromagnetic induction
C) Reflection
D) Refraction
41. The splitting of water into hydrogen and oxygen is:
A) Evaporation
B) Electrolysis
C) Condensation
D) Diffusion
42. The fuse wire is made of:
A) Copper
B) Iron
C) Alloy with low melting point
D) Aluminium
43. A fuse is connected in:
A) Parallel
B) Series
C) Either series or parallel
D) Not connected
44. The function of an electric fuse is:
A) Increase current
B) Prevent overheating
C) Store electricity
D) Increase voltage
45. Which gas is used in CFL bulbs?
A) Oxygen
B) Nitrogen
C) Mercury vapour
D) Hydrogen
46. The image formed on a screen is always:
A) Virtual
B) Real
C) Erect
D) Diminished
47. A convex lens forms a real image when the object is placed:
A) At focus
B) Between optical centre and focus
C) Beyond focus
D) At optical centre
48. The colour of sky is blue due to:
A) Reflection
B) Dispersion
C) Scattering of light
D) Refraction
49. Which radiation has shortest wavelength?
A) Infrared
B) Visible light
C) Ultraviolet
D) X-rays
50. Sound cannot travel in:
A) Air
B) Water
C) Vacuum
D) Steel
✅ Answer Key (1–50)
1-B, 2-B, 3-C, 4-A, 5-D, 6-B, 7-C, 8-B, 9-A, 10-C,
11-B, 12-B, 13-A, 14-B, 15-C, 16-B, 17-C, 18-B, 19-C, 20-B,
21-C, 22-C, 23-D, 24-B, 25-A,
26-B, 27-A, 28-C, 29-B, 30-B,
31-B, 32-B, 33-B, 34-B, 35-A,
36-B, 37-B, 38-B, 39-B, 40-B,
41-B, 42-C, 43-B, 44-B, 45-C,
46-B, 47-C, 48-C, 49-D, 50-C
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