Free Measurements MCQs with Answers
262 Measurements MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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- A. [L]
- B. [T]
- C. [L][T-1]
- D. [L][T-2]
Explanation: The second equation of motion is s = vft + 1/2 at2. The dimension of the first term vft is [L][T-1][T] = [L].
Correct answer: [L][T-2]- A. MLT-2 and LT-2
- B. ML2 T and LT-2
- C. MLT-2 and LT2
- D. MLT-2 and LT-1
Explanation: Force (F) is defined by Newton's second law as mass (m) multiplied by acceleration (a) (F = ma).* The dimension of mass is [M] (Mass).*…
Correct answer: MLT-2 and LT-1- A. [L]
- B. [T]
- C. [L-1]
- D. [T-1]
Explanation: The second equation of motion is given by S = vit + ½ at2, where S is the displacement, vi is the initial velocity, a is the acceleration…
Correct answer: [L]- A. [MLT-1]
- B. [ML2T-1]
- C. [MLT-2]
- D. [ML-1T]
Explanation: Momentum is defined as the product of mass and velocity, so its dimensions are given by multiplying the dimensions of mass (M) and…
Correct answer: [MLT-1]- A. 0.34 cm.
- B. 3.4 cm.
- C. 3.40 cm.
- D. 3.400 cm.
Explanation: The correct answer is 3.400 cm. Vernier calipers provide more precise measurements than a standard metre scale, typically offering…
Correct answer: 3.400 cm.- A. II only.
- B. III only.
- C. I and II.
- D. I and III.
Explanation: Option II is correct because taking the mean of several measurements helps to minimize the effect of random errors by averaging out the…
Correct answer: II only.- A. 3
- B. 5
- C. 6
- D. 8
Explanation: To find the number of significant figures in the sum of 1.21 × 105 and 3.26 × 103, first, convert both numbers to the same power of ten…
Correct answer: 8- A. Taking mean reading.
- B. Repeating the reading.
- C. Changing the surrounding.
- D. Recalibrating the instrument.
Explanation: Systematic errors are consistent biases in measurement that arise from flaws in the measurement system, such as miscalibrated instruments.
Correct answer: Recalibrating the instrument.- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation: Uncertainty in measurement can arise from multiple sources. Natural variations (II) refer to the inherent variability in the system being…
Correct answer: II and III.- A. II only.
- B. III only.
- C. I and II.
- D. I and III.
Explanation: The correct answer is Option A:II only.Random errors can be reduced by taking the mean of several measurements, as this averages out the…
Correct answer: II only.- A. 1.00 x 10^-3
- B. 1.00 x 10^-2
- C. 1.00 x 10^2
- D. 1.00 x 10^3
Explanation: The correct scientific notation for 100.00 is1.00 × 103because scientific notation requires expressing a number as a product of a…
Correct answer: 1.00 x 10^3- A. Logical error
- B. Random error
- C. Personal error
- D. Systematic error
Explanation: The correct answer is systematic error. Systematic errors are errors that consistently occur in the same direction whenever a particular…
Correct answer: Systematic error- A. 408.6
- B. 408.64
- C. 408.6462
- D. 409.0
Explanation: To solve this problem, multiply 20.21 by 20.22 to get approximately 408.6442.
Correct answer: 408.6- A. Precise
- B. Accurate
- C. Uncertain
- D. Unreliable
Explanation: The correct answer is precise. Precision in measurements or actions means the results are consistent or close to each other, regardless of…
Correct answer: Precise- A. 0.5
- B. 5
- C. 6.5
- D. 7
Explanation: Read the main scale reading (MSR):Observe the mark on the main scale that is just before the zero mark of the Vernier scale.
Correct answer: 6.5- A. Friction in the pulleys
- B. Use of rusty holding pins
- C. Use of inaccurate weights
- D. Placement of the drawing board
Explanation: Friction in the pulleys is the correct answer because it directly impacts the smooth movement of the apparatus, affecting the accuracy of…
Correct answer: Friction in the pulleys- A. Loss of heat due to radiation
- B. Large increase in temperature of water
- C. Greater least count of the thermometer
- D. Non-steady voltage of the power supply
Explanation: The correct answer is option C: Greater least count of the thermometer.
Correct answer: Greater least count of the thermometer- A. Available scale
- B. Standard size
- C. Each other
- D. Other physical quantities
Explanation: When the different magnitudes of certain physical quantities are measured then it should be measured according to a standard measure which…
Correct answer: Standard size- A. LT-1
- B. LT-2 and LT-1
- C. L3 and LT-2
- D. L4 T-1 and LT
- E. LT3 and T2
Explanation: The following is the solution:Volume is equal to L x L x L=L3 Acceleration is equal to the rate of changeof velocity=Velocity/Time…
Correct answer: L3 and LT-2- A. LT-1
- B. LT-2
- C. L3
- D. L2
- E. LT2
Explanation: The following is the solution:Acceleration =Difference of velocity/TimeVelocity =Distance/TimeVelocity =L/TTherefore:Acceleration…
Correct answer: LT-2Measurements MCQs: common questions
Are these Measurements MCQs free?
Yes. All Measurements MCQs from Physics are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Measurements MCQs are on this page?
There are 262 Measurements MCQs in the Physics bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Measurements MCQ have an explanation?
Yes. Each Measurements question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Measurements test?
Yes. The practice button on this page starts a free Measurements test drawn from the Physics bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.