10th Class Past Papers Lahore Board 2023, Physics MCQs Group 1

Physics MCQs, 10th Class Past Papers Lahore Board 2023

Physcis MCQs with Answers BISE Lahore 2023

1. When water waves enters the region of shallow water their wave length:
   • (a). Remain same
   • (b). Become zero
   • (c). Increases
   • (d).  Decreases
     • Answer: (D)
2. Capacitance is defined as:
   • (a). VC
   • (b). QC
   • (c).  Q/V
   • (d) V/Q
     • Answer: (c)
3. Power of hair dryer is
   • (a). 1500 watt
   • (b). 1200 watt
   • (c). 800 watt
   • (d). 1000 watt
     • Answer: (D)
4. The half life of a certain isotope is one day. What is the quantity of the isotope after two days:
   • (a). One half
   • (b). One-quarter
   • (c). One-eight
   • (d). One-sixteenth
     • Answer: (B)
5. Half life of Cobalt ⁶⁰ ₂₇ CO is:
   • (a). 2.85 years
   • (b). 12.3 years
   • (c). 30 years
   • (d). 40 years
     • Answer: (C)
6. The brain of any computer system is:
   • (a). Monitor
   • (b). Memory
   • (c). CPU
   • (d). Control Unit
     • Answer: (C)
7. Intensity of sound of lawn power:
   • (a). 10¹Wm^-2
   • (b). 10^-2Wm^-2
   •   (c). 10^-5Wm^-2
   • (d). 10^-8Wm^-2
     • Answer: (B)
8. The particles emitted from a hot cathode surface are called:
   • (a). Positive ions
   • (b). Negative Ions
   • (c). protons
   • (d). Electrons
     • Answer: (D)
9. The index of refraction depends on:
   • (a). The object distance
   • (b). The image distance
   • (c). The focal length
   • (d). The speed of light
     • Answer: (D)
10. If the current in a wire which is placed perpendicular to a magnetic field increases. The force on the wire:
    • (a). Increases
    • (b). Decreases
    • (c). Remains the same
    • (d). Will be zero
      • Answer: (A)
11. What is the power rating of a lamp connected to a 12v source when it carries 2.5A current:
    • (a). 60 W
    • (b). 30 W
    • (c). 14.5 W
    • (d). 4.8 W
      • Answer:(B)
12. How does sound travel from its source to your ear:
    • (a). By change in air pressure
    • (b). By vibration in wire or string
    • (c). By electromagnetic waves
    • (d). By infrared waves
      • Answer:(B)

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