వాహనాల్లో రియర్‌వ్యూ మిర్రర్‌గా ఏ అద్దాన్ని ఉపయోగిస్తారు?

1. The SI unit of force is:
   (A) Joule
   (B) Watt
   (C) Newton
   (D) Pascal
   Answer: (C) Newton

2. Which device is used to measure temperature?
   (A) Barometer
   (B) Hydrometer
   (C) Thermometer
   (D) Altimeter
   Answer: (C) Thermometer

3. What is the speed of light?
   (A) 3 × 10⁸ m/s
   (B) 3 × 10⁶ m/s
   (C) 3 × 10⁷ m/s
   (D) 3 × 10⁵ m/s
   Answer: (A) 3 × 10⁸ m/s

4. Which mirror is used in vehicles as a rearview mirror?
   (A) Plane
   (B) Concave
   (C) Convex
   (D) None
   Answer: (C) Convex

5. Sound cannot travel through:
   (A) Solid
   (B) Liquid
   (C) Gas
   (D) Vacuum
   Answer: (D) Vacuum

6. What is the unit of work?
   (A) Watt
   (B) Joule
   (C) Newton
   (D) Meter
   Answer: (B) Joule

7. The force of attraction between two masses is called:
   (A) Gravitational Force
   (B) Magnetic Force
   (C) Electrostatic Force
   (D) Nuclear Force
   Answer: (A) Gravitational Force

8. Unit of electric current is:
   (A) Ampere
   (B) Volt
   (C) Ohm
   (D) Watt
   Answer: (A) Ampere

9. Which color of light has the highest speed in vacuum?
   (A) Red
   (B) Green
   (C) Blue
   (D) All have same speed
   Answer: (D) All have same speed

10. What type of lens is used to correct myopia?
    (A) Convex
    (B) Plano-convex
    (C) Concave
    (D) Cylindrical
    Answer: (C) Concave