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| Physics(Measurement & Unit) Top40 Important MCQ For All Competitive Exam |
Measurement & Unit
1. Fundamental quantities
(a) are not independent of other physical quantities.
(b) are independent of other physical quantities.
(c) cannot be expressed in physical law.
(d) None of the above
Ans- B
2. A physical quantities
(a) cannot be measured.
(b) can be expressed in the form of law.
(c) can be represented completely by its magnitude and unit.
(d) Both (b) and (c)
Ans- D
3. Which of the following is not one of the fundamental quantities in Physics?
(a) Length
(b) Time
(c) Weight
(d) Mass
Ans- C
4. Those quantities which can be derived from the fundamental quantities are called
(a) Fundamental Unit
(b) Derived Quantities
(c) Precision
(d) None of the above
Ans- B
5. Which of the following is a derived quantity in Physics?
(a) Length
(b) Time
(c) Mass
(d) Velocity
Ans- D
6. Scalar quantities do not have
(a) magnitude
(b) direction
(c) magnitude and direction
(d) None of the above
Ans- B
7. Vector quantities have
(a) magnitude
(b) direction
(c) magnitude and direction
(d) not magnitude and direction
Ans- C
8. Which of the following is a scalar quantity?
(a) Velocity
(b) Force
(c) Angular momentum
(d) Electrostatic potential
Ans- D
9. Which of the following is not a vector quantity?
(a) Speed
(b) Velocity
(c) Torque
(d) Displacement
Ans- A
10. Which one of the following is a vector quantity?
(a) Momentum
(b) Pressure
(c) Energy
(d) Work
Ans- A
11.The unit of work is
(A) Joule
(B) Neutron
(C) Watt
(D) Dyne
Ans-A
12. The SI unit of electrical resistance of conductor is
(A) Faraday
(B) Volts
(C) Ampere
(D) Ohm-metre
Ans - D
13. The unit of power is
(A) Hertz
(B) Volts
(C) Watt
(D) Neutrons
Ans- C
14.A nautical mile is equal to ……… .
(a) 2000 metres
(b) 1852 metres
(c) 1672 metres
(d) 2450 metres
Ans- B
15. Light year is the unit of
(A) Distance
(B) Time
(C) Speed of light
(D) Intensity of light
Ans- A
16. Which one of the following is the unit of measure of the thickness of the ozone layer of the atmosphere?
(A) Knot
(B) Dobson
(C) Poise
(D) Maxwell
Ans- B
17. ‘Light Year’ is
(A) The year in which February has 29 days
(B) The distance travelled by light in one year
(C) The time which Sun rays take to reach the Earth
(D) The time in which a spacecraft reaches Moon from the Earth
Ans- B
18. A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to
(A) 4.25 light years
(B) 3.25 light years
(C) 4.50 light years
(D) 3.05 light years
Ans- B
19. PARSEC is the unit of
(A) Distance
(B) Time
(C) Light intensity
(D) Magnetic force
Ans- A
20.Ampere is the unit of
(A) Voltage
(B) Electric current
(C) Resistance
(D) Power
Ans-B
21. Megawatt is the measuring unit of power which is
(A) Generated
(B) Consumed
(C) Saved
(D) Lost in transmission
Ans-A
22. Which one of the following SI unit is not correctly matched?
(A) Work - Joule
(B) Force - Newton
(C) Mass - kg
(D) Pressure - Dyne
Ans- D
23. Which one of the following is not correctly matched?
(A) Knot - Measure of speed of ship
(B) Nautical mile - Unit of distance used in navigation
(C) Agnstrom - Unit of wavelength of light
(D) Light year - Unit of measuring time
Ans-D
24. How many watts are there in a horsepower?
(A) 1000
(B) 750
(C) 746
(D) 748
Ans- C
25. Which of the following is not a unit of speed?
(a) m/s
(b) km/hr
(c) m2 /hr
(d) cm/s
Ans- C
26. Which of the following quantities does not have any unit?
(a) Speed
(b) Density
(c) Relative Density
(d) Acceleration
Ans - C
27. The unit for measurement of energy is
(a) Pascal
(b) Joule
(c) Calorie
(d) Horse Power
Ans- B
28. Which one of the following is the unit of Force?
(a) Pascal
(b) Watt
(c) Joule
(d) Newton
Ans- D
29. Which of the following represents Volt?
(a) Joule/Second
(b) Watt/Ampere
(c) Watt/Coulomb
(d) Coulomb/Joule
Ans -B
30. The unit of electric power is
(a) Ampere
(b) Volt
(c) Coulomb
(d) Watt
Ans - D
31. The symbol of SI unit of inductance is H. It stands for
(a) Holm
(b) Halogen
(c) Henry
(d) Hertz
Ans- C
32. Maxwell is the unit of which one of the following?
(a) Magnetic flux
(b) Permeability
(c) Magnetic susceptibility
(d) Intensity of magnetisation
Ans- A
33. The SI unit of luminous emittance is
(a) Lux
(b) Candela
(c) Lumen
(d) Lumen second
Ans-A
34. The SI unit of radioactivity is ……… .
(a) Ampere
(b) Becquerel
(c) Decibel
(d) Cobolt
Ans- B
35. The SI unit of weight is
(a) Kg
(b) Newton
(c) Gram
(d) Dyne
Ans- B
36. The SI unit for electrical resistivity is
(a) Ampere/meter
(b) Volt/meter
(c) Tesla
(d) Ohm meter
Ans- D
37. Which of the following quantities have its SI unit named after Blaise Pascal?
(a) Energy
(b) Pressure
(c) Work
(d) Power
Ans- B
38. The SI unit for the average velocity is ……… .
(a) m/s
(b) km/s
(c) m/s2
(d) ms
Ans- A
39. Newton-metre (Nm) is the SI unit of which of the following physical quantity?
(a) Acceleration
(b) Torque
(c) Power
(d) force
Ans- B
40. What is the unit of solid angle?
(a) Newton
(b) Steradian
(c) Radian
(d) Watt
Ans- B
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