Multiple choice questions of Chapter 1 of Physics for First Year.

1. The branch of physics which deals with the ultimate particles of which the matter is composed is:a) Plasma physics

b) Atomic physics

c) Nuclear physics

d)

**Particle physics**

**2. The branch of physics which deals with atomic nuclei is called**

a) Acoustics

b) Thermodynamics

c) Magnetism

d)

**Nuclear physics**

**3. Silicon is abundantly obtained from:**

a) Water

b) Metal

c)

**Sand**

d) Stones

4. The number of base units are:

a) Three

b) Five

c)

**Seven**

d) Nine

5. Which of the following is a derived quantity:

a)

**Force**

b) Mass

c) Length

d) Time

6. Which of the following is SI base unit?

a) gram

b) slug

c) Newton

d)

**Kilogram**

**7. Which one of the following is not a unit of length:**

a) Angstrom

b) Micron

c)

**Radian**

d) Light year

8. Which is not a base unit in SI units?

a) Kilogram

b)

**Joule**

c) Ampere

d) Kelvin

9. An example of derived unit is

a) Candela

b) Ampere

c)

**Coulomb**

d) Mole

10. Candela is the SI unit of

a) Charge

b)

**Luminous intensity**

c) Power

d) Refractive index

11. An alternate unit to Kgms-1 is

a) Js

b)

**Ns**

c) Nm

d) N

12. The SI unit of plane angle is

a) Steradian

b)

**Radian**

c) Degree

d) Candela

13. Steradian is the angel which lies in:

a) One dimension

b) Two dimensions

c)

**Three dimensions**

d) None

14. The SI unit of the solid angle is

a) Degree

b)

**Steradian**

c) Revolution

d) Radian

15. The solid angle subtended at the center of sphere by an area of its surface equal to the square of radius of the sphere is called:

a) Degree

b) Radian

c) Minute

d)

**Steradian**

**16. Which is a derived unit:**

a) Candela

b) Ampere

c)

**Kelvin**

d) Newton

17. The unit of force is________ and its symbol is_______ which is the correct pair?

a) Newton, n

b) Newton, N

c) newton, n

d)

**newton, N**

**18. Which one is the correct representation of the unit of pressure?**

a) Newton/Meter

b) newton2/meter

c) Newton2/meter2

d)

**Newton/Meter2**

**19. Which of the following is least multiple:**

a) Pico

b) Femto

c) Nano

d)

**Atto**

**20. Which one is the highest power multiple?**

a)

**giga**

b) mega

c) kilo

d) deca

21. The SI unit of intensity of light is:

a) Mole

b) Kelvin

c)

**Candela**

d) Ampere

22. 1024 can be written in scientific notation as

a)

**1.024x 103**

b) 2^10

c) 0.000976

d) 1/0300097

23. Error occurs due to negligence and inexperience of a person is:

a) Systematic Error

b) Random Error

c)

**Personal Error**

d) None

24. Error in measurement may occur due to

a) Inexperience of a person

b) The faulty apparatus

c) Inappropriate method

d)

**Due to all reasons in a, b and c**

**25. In any measurement the significant figures are**

a) All accurately known and all doubtful digits

b) Only accurately known digits

c) Only doubtful digits

d)

**All accurately know digits and the first doubtful digit**

**26. Number of significant figures in 0.0173 are:**

a)

**Three**

b) Four

c) Five

d) Two

27. A student added three figures 72.1, 3.32 and 0.003. The correct answer regarding the rules of the addition of the significant figures will be

a) 75.423

b) 75.42

c)

**75.4**

d) 75

28. If the reading is taken with measuring scale whose minimum division is 1mm, then the correct reading is:

a) 0.2145 m

b) 0.21 m

c)

**0.214 m**

d) None

29. 75.560 is round off as:

a)

**75.6**

b) 75.7

c) 76.00

d) None

30. Zero to the right of non-zero digits are:

a)

**Significant**

b) Not significant

c) May or may not be significant

d) None

31. What is the number of significant figures in the measurement recorded as 8.70 × 10^4 ?

a) 1

b)

**3**

c) 4

d) 7

32. Zero is not significant only if it

a)

**Lies to the left of a significant digit**

b) is between two digits

c) is to the right of a significant digit

d) is before the decimal point

33. Significant figures in 0.000846 are

a) Six

b) Four

c) Seven

d)

**Three**

**34. The sum of the three numbers, 2.7543, 4.10 and 1.273, up to correct decimal places is**

a) 8.1

b)

**8.13**

c) 8.1273

d) 8.127

35. 73.650 rounded off up to one decimal is

a)

**73.6**

b) 73.7

c) 74.00

d) 73.65

36. Absolute uncertainties are added in following operations:

a) Multiplication

b) Division

c)

**Subtraction**

d) None

37. An accurate measurement is one which has less

a) Precision

b) Absolute uncertainty

c)

**Fractional uncertainty**

d) None

38. Smaller is the least count of the instrument, more is the measurement:

a) Accurate

b)

**Precise**

c) Accurate and precise

d) None of these

39. Which is a correct record for the diameter of wire when measured my a screw gauge of least count 0.001 cm:

a) 2.3 cm

b) 2.31 cm

c)

**2.312 cm**

d) 2.3124 cm

40. Which one of the following is not regarded as a fundamental quantity in Physics?

a) Length

b) Mass

c) Time

d)

**Weight**

**41. The dimension of the following pair is not the same**

a) work & energy

b) work and torque

c) Momentum & impulse

d)

**Mass & moment of inertia**

**42. Unit of G is ?**

a) Nm2 kg2

b) N m2 kg

c)

**N m2 kg-2**

d) None

43. A light year is a unit for

a) Time

b)

**Distance**

c) Velocity

d) Time period

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