1. The SI unit of length is:
A) Foot
B) Meter
C) Inch
D) Yard
Answer: B
2. The SI unit of mass is:
A) Gram
B) Pound
C) Kilogram
D) Tonne
Answer: C
3. The SI unit of time is:
A) Minute
B) Hour
C) Second
D) Day
Answer: C
4. Which of the following is a derived quantity?
A) Length
B) Mass
C) Time
D) Velocity
Answer: D
5. The SI unit of temperature is:
A) Celsius
B) Fahrenheit
C) Kelvin
D) Rankine
Answer: C
6. The instrument used to measure very small lengths like diameter of a wire is:
A) Meter rule
B) Vernier caliper
C) Measuring tape
D) Thermometer
Answer: B
7. The least count of a typical vernier caliper is:
A) 1 cm
B) 1 mm
C) 0.1 cm
D) 0.01 cm
Answer: D
8. The physical quantity measured in amperes is:
A) Voltage
B) Resistance
C) Electric current
D) Power
Answer: C
9. The SI unit of force is:
A) Joule
B) Watt
C) Newton
D) Pascal
Answer: C
10. Which prefix means one thousand (1000)?
A) Milli
B) Centi
C) Kilo
D) Micro
Answer: C
11. The SI unit of pressure is:
A) Newton
B) Joule
C) Pascal
D) Watt
Answer: C
12. A measuring cylinder is used to measure:
A) Mass
B) Time
C) Volume of liquid
D) Temperature
Answer: C
13.The SI unit of energy is:
A) Watt
B) Joule
C) Newton
D) Volt
Answer: B
14.Which of the following is a base quantity?
A) Speed
B) Density
C) Force
D) Length
Answer: D
15.The SI unit of electric charge is:
A) Ampere
B) Coulomb
C) Volt
D) Ohm
Answer: B
16.The physical quantity measured in watts is:
A) Energy
B) Power
C) Force
D) Pressure
Answer: B
17.The prefix “micro” represents:
A) 10⁻³
B) 10⁻⁶
C) 10³
D) 10⁶
Answer: B
18.Which device is used to measure time accurately in laboratories?
A) Clock
B) Stopwatch
C) Hourglass
D) Calendar
Answer: B
19.The SI unit of density is:
A) kg/m
B) g/cm³
C) kg/m³
D) N/m³
Answer: C
20.Which of the following is not an SI base unit?
A) Meter
B) Second
C) Kilogram
D) Liter
Answer: D
21. The unit of frequency is:
A) Decibel
B) Hertz
C) Watt
D) Ohm
Answer: B
22.The physical quantity of amount of substance is measured in:
A) Gram
B) Mole
C) Liter
D) Kilogram
Answer: B
23.The SI unit of electric potential difference is:
A) Ampere
B) Ohm
C) Volt
D) Watt
Answer: C
24. The unit used to measure plane angle is:
A) Degree
B) Radian
C) Steradian
D) Meter
Answer: B
25. Which prefix represents 10⁻²?
A) Milli
B) Micro
C) Centi
D) Nano
Answer: C
26.The SI unit of resistance is:
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: C
27.The unit of luminous intensity is:
A) Lux
B) Lumen
C) Candela
D) Kelvin
Answer: C
28.The SI unit of area is:
A) Meter
B) Square meter
C) Cubic meter
D) Kilometer
Answer: B
29.Which instrument is used to measure atmospheric pressure?
A) Thermometer
B) Barometer
C) Hygrometer
D) Anemometer
Answer: B
30.The SI unit of volume is:
A) Liter
B) cm³
C) m³
D) dm³
Answer: C