Free Displacement and Velocity MCQs with Answers
86 Displacement and Velocity MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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- A. Newton/Meter2
- B. newton/meter2
- C. Newton/meter2
- D. newton/Meter2
Explanation: Pressure is force divided by area, so its SI unit is newton per square metre, written in words as newton/meter2 or more formally as N/m².
Correct answer: newton/meter2- A. Newton, n
- B. Newton, N
- C. newton, n
- D. newton, N
Explanation: The SI unit name is written as newton in lowercase, while its symbol is N in uppercase because it is named after a person.
Correct answer: newton, N- A. 10 raised to power -15
- B. 10 raised to power -12
- C. 10 raised to power -9
- D. 10 raised to power -6
Explanation: The SI prefix pico represents one trillionth, so pico = 10^-12. Thus 1 ps, for example, is 10^-12 s.
Correct answer: 10 raised to power -12- A. Giga
- B. Beta
- C. Mega
- D. Deca
Explanation: Among the valid prefixes listed, giga is the largest: giga = 10^9, mega = 10^6, and deca = 10^1. Beta is not an SI prefix.
Correct answer: Giga- A. Sum of their absolute uncertainties
- B. The difference of their absolute uncertainties
- C. The product of their absolute uncertainties
- D. Division of their absolute uncertainties
Explanation: For subtraction, the maximum absolute uncertainty is found by adding the absolute uncertainties: if z = x - y, then Δz = Δx + Δy.
Correct answer: Sum of their absolute uncertainties- A. Accessible
- B. Invariable
- C. Transportable
- D. Only a and b are correct
Explanation: An ideal standard should be accessible and invariable, so its value can be obtained conveniently and does not change with time or…
Correct answer: Only a and b are correct- A. Only (i)
- B. Only (ii)
- C. Only (iii)
- D. Both (i) and (ii)
Explanation: A metre rod normally has a least count of 1 mm = 0.001 m, so a reading should be recorded to the nearest 0.001 m.
Correct answer: Only (iii)- A. Accurate
- B. Precise
- C. Accurate and precise
- D. None of these
Explanation: A smaller least count lets an instrument resolve smaller changes, so it gives greater precision.
Correct answer: Precise- A. 3
- B. 4
- C. 5
- D. 2
Explanation: In 0.0173, the zeros before 1 are leading zeros and are not significant; the digits 1, 7 and 3 are significant.
Correct answer: 3- A. May be significant may not significant
- B. Always significant
- C. Always insignificant sign
- D. Significant only if left to a significant figure
Explanation: A zero may be significant or insignificant depending on its position: zeros between nonzero digits are significant, while leading zeros…
Correct answer: May be significant may not significant- A. All accurately known and all doubtful digits
- B. Only accurately known digits
- C. Only doubtful digits
- D. All accurately known digits and the first doubtful digit
Explanation: A measurement contains all digits known with certainty plus one final digit that is estimated or doubtful.
Correct answer: All accurately known digits and the first doubtful digit- A. Taking zero correction
- B. Comparing the instrument with another more accurate one
- C. Taking mean of several measurements
- D. All methods explained in A, B and C
Explanation: Random errors vary unpredictably from one reading to another, so averaging several readings tends to cancel positive and negative…
Correct answer: Taking mean of several measurements- A. Limitation of an instrument
- B. Natural variation of the object to be measured
- C. Inadequate technique
- D. All given in A, B and C
Explanation: Uncertainty can result from the instrument’s finite resolution, natural changes in the measured object, or an imperfect measurement…
Correct answer: All given in A, B and C- A. The inexperience of a person
- B. The faulty apprentice
- C. Inappropriate method
- D. Due to all reasons in A, B and C
Explanation: Inexperience, faulty apparatus, and an inappropriate method can all produce a difference between a measured value and the accepted value.
Correct answer: Due to all reasons in A, B and C- A. 10 Raised to power 1
- B. 10 Raised to power 2
- C. 10 Raised to power 3
- D. 10 Raised to power -1
Explanation: The SI prefix deca means a factor of 10, written as 10^1. Students may choose b because kilo is the familiar larger prefix and represents…
Correct answer: 10 Raised to power 1- A. 1.024 x 10^3
- B. 2 Raised to power 10
- C. 0.000976
- D. 1/0.00097
Explanation: Scientific notation requires one nonzero digit before the decimal point, so 1024 = 1.024 × 10^3.
Correct answer: 1.024 x 10^3- A. Power of ten
- B. Powers of two
- C. Reciprocal
- D. Decimal
Explanation: Scientific notation writes a number as a coefficient multiplied by a power of ten, such as 3.2 × 10^5.
Correct answer: Power of ten- A. at2/2
- B. Vt
- C. a2t/2
- D. at2
Explanation: For motion from rest with constant acceleration, initial velocity u = 0, so displacement s = ut + 1/2 at^2 = 0 + 1/2 at^2 = at^2/2 metres…
Correct answer: at2/2- A. 5m/s, 1m/s
- B. 3m/s, 3m/s
- C. 6m/s, 1m/s
- D. 4m/s, 2m/s
Explanation: When the bodies move toward each other, their relative speed is v1 + v2 = 6 m/s; moving in the same direction, it is v1 - v2 = 4 m/s.
Correct answer: 5m/s, 1m/s- A. speed changes
- B. acceleration changes
- C. direction of motion changes
- D. displacement from origin changes
Explanation: Uniform velocity means both speed and direction remain constant, so the body continues changing its position and its displacement from the…
Correct answer: displacement from origin changes