11. Which of the following is a scalar quantity?
A) Displacement
B) Velocity
C) Force
D) Temperature
12. The unit of frequency is:
A) Hertz
B) Joule
C) Newton
D) Tesla
13. Which instrument is used to measure atmospheric pressure?
A) Thermometer
B) Barometer
C) Hygrometer
D) Anemometer
14. The SI unit of electric charge is:
A) Coulomb
B) Ampere
C) Volt
D) Ohm
15. Which of the following is a vector quantity?
A) Speed
B) Mass
C) Acceleration
D) Temperature
16. The unit of work in the SI system is:
A) Newton
B) Joule
C) Watt
D) Pascal
17. Which instrument is used to measure temperature?
A) Barometer
B) Thermometer
C) Caliper
D) Micrometer
18. The prefix ‘mega-‘ denotes a factor of:
A) 10^3
B) 10^6
C) 10^9
D) 10^12
19. Which physical quantity is measured in Joules?
A) Power
B) Energy
C) Force
D) Pressure
20. The SI unit of power is:
A) Joule
B) Watt
C) Newton
D) Pascal