Physics 9th Chap 1 Topic 4(SI Unit)

/37

Physics Chapter 1 (Topic4 : SI unit)

Apply the seven units of System International (SI) [along with
their symbols and physical quantities]
Question(s) will be asked in final examination.

1 / 37

Which SI base unit is used to measure length?

A) ampere (A)

B) kilogram (kg)

C) meter (m)

D) second (s)

2 / 37

Which physical quantity is measured in kilogram (kg)?

A) Weight

B) Mass

C) Energy

D) Force

3 / 37

Which SI unit is correctly matched with time?

A) second (s)

B) ampere (A)

C) kelvin (K)

D) meter (m)

4 / 37

Which of the following correctly identifies temperature measurement?

A) kelvin (K)

B) kilogram (kg)

C) mole (mol)

D) meter (m)

5 / 37

Which SI unit is used for electric current?

A) ohm (Ω)

B) volt (V)

C) coulomb (C)

D) ampere (A)

6 / 37

Which physical quantity is associated with mole (mol)?

A) Mass

B) Temperature

C) Energy

D) Amount of substance

7 / 37

Which SI unit is used for luminous intensity?

A) candela (cd)

B) lumen (lm)

C) lux (lx)

D) watt (W)

8 / 37

Which set contains only SI base units?

A) Meter, Kilogram, Second

B) Pascal, Volt, Ampere

C) Newton, Joule, Watt

D) Joule, Candela, Newton

9 / 37

Which physical quantity uses meter (m) as its unit?

A) Force

B) Length

C) Energy

D) Mass

10 / 37

A student measures current in a circuit. Which unit should be used?

A) watt (W)

B) ohm (Ω)

C) ampere (A)

D) volt (V)

11 / 37

Which SI unit is incorrectly matched with its physical quantity?

A) Time – second

B) Temperature – Kelvin

C) Mass – kilogram

D) Force – newton

12 / 37

Which of the following is NOT an SI base unit?

A) kilogram

B) second

C) meter

D) joule

13 / 37

Which SI unit would you use to measure the length of a classroom?

A) A

B) m

C) s

D) kg

14 / 37

Which physical quantity is measured using ampere (A)?

A) Power

B) Charge

C) Energy

D) Electric current

15 / 37

Which combination correctly matches quantity and SI unit?

A) Time – kilogram

B) Mass – meter

C) Current – meter

D) Temperature – Kelvin

16 / 37

Which SI base unit is used in measuring body weight (indirectly mass)?

A) candela

B) kilogram

C) Kelvin

D) ampere

17 / 37

Which of the following correctly identifies SI unit symbols?

A) kilogram – Kg

B) second – s

C) ampere – amp

D) meter – M

18 / 37

Which SI base quantity is linked with candela (cd)?

A) Luminous intensity

B) Temperature

C) Mass

D) Length

19 / 37

Which situation correctly uses SI base units?

A) Mass = 5 kg

B) Force = heavy

C) Speed = 10 fast

D) Length = long

20 / 37

Which SI base unit is common in all mechanical measurements?

A) meter

B) candela

C) kelvin

D) mole

21 / 37

Which physical quantity does NOT use SI base units directly?

A) Mass

B) Time

C) Force

D) Length

22 / 37

Which is a correct SI base unit set?

A) energy, mass, time, force

B) volt, ohm, coulomb, watt

C) joule, watt, newton, pascal

D) meter, kilogram, second, ampere

23 / 37

What is the SI unit of measuring duration of an event?

A) kilogram

B) ampere

C) meter

D) second

24 / 37

Which SI unit is used to measure chemical amount in physics?

A) kilogram

B) candela

C) mole

D) kelvin

25 / 37

Which physical quantity is correctly paired?

A) Temperature – kelvin

B) Energy – meter

C) Mass – second

D) Force – kilogram

26 / 37

Which of the following is correctly used in real-life measurement?

A) Distance = 50 kg

B) Current = 10 m

C) Mass = 5 kg

D) Time = 20 m

27 / 37

Which SI base unit is used in laboratory measurement of heat-related temperature?

A) meter

B) ampere

C) kelvin

D) mole

28 / 37

Which statement is correct about SI base units?

A) They are not used in physics

B) They depend on force

C) They are independent fundamental units

D) They are derived from formulas

29 / 37

Which is a correct pairing of physical quantity and SI unit symbol?

A) Current – K

B) Time – s

C) Length – kg

D) Mass – m

30 / 37

Which SI base unit is essential for measuring electrical phenomena?

A) meter

B) kelvin

C) ampere

D) mole

31 / 37

Which of the following is NOT correctly matched?

A) Mass – kilogram

B) Force – meter

C) Length – meter

D) Time – second

32 / 37

Why are SI base units important in physics?

A) They replace calculations

B) They provide standard measurement system

C) They remove units

D) They make numbers smaller

33 / 37

Which SI unit would be used to measure brightness intensity?

A) kelvin

B) candela

C) ampere

D) meter

34 / 37

Which is correctly expressed physical quantity?

A) Mass = 2 kg

B) Time = fast

C) Temperature = hot

D) Length = long

35 / 37

Which SI base unit is NOT related to mechanics?

A) meter

B) candela

C) kilogram

D) second

36 / 37

Which of the following correctly represents SI system usage?

A) Using random units

B) Using standard base units for measurements

C) Using only derived units

D) Avoiding units

37 / 37

A student writes “distance = 20”. Why is this scientifically incorrect?

A) Distance cannot be measured

B) Distance is a derived quantity

C) Number must always be negative

D) Unit is missing

Your score is