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Units and Measurement

MHT-CET Physics. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 7 times: 20 Apr 2025 S2, 25 Apr 2025 S1, 26 Apr 2025 S1, 15 Apr 2026 S2, 16 Apr 2026 S1, 16 Apr 2026 S2, 19 May 2026 S2. This one: 19 May 2026 S2 See all 7 of this type

    102
    A wire has mass (0.4±0.002)(0.4 \pm 0.002) g, radius (0.6±0.006)(0.6 \pm 0.006) mm and length (8±0.04)(8 \pm 0.04) cm. The percentage error in the measurement of its density is

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  2. Question 2

    This type asked 7 times: 19 Apr 2025 S1, 21 Apr 2025 S1, 26 Apr 2025 S2, 11 Apr 2026 S2, 20 Apr 2026 S2, 12 May 2026 S2, 15 May 2026 S2. This one: 15 May 2026 S2 See all 7 of this type

    102
    A physical quantity CC is related to four other quantities P,Q,RP, Q, R and SS as C=PQ2R3SC = \dfrac{PQ^2}{R^3\sqrt{S}}. The percentage error in the measurement of P,Q,RP, Q, R and SS are 1%1\%, 2%2\%, 3%3\% and 2%2\% respectively. The percentage error in the measurement of CC will be

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  3. Question 3

    This type asked 5 times: 22 Apr 2025 S1, 11 Apr 2026 S1, 13 Apr 2026 S1, 12 May 2026 S1, 14 May 2026 S2. This one: 14 May 2026 S2 See all 5 of this type

    117
    The period of oscillation of a simple pendulum is T=2πlgT = 2\pi\sqrt{\dfrac{l}{g}} where ll is about 100100 cm and has 11 mm accuracy. The period is about 22 s. The time of 100100 oscillations is measured by a stopwatch of least count 0.10.1 s. The percentage error in 'gg' is (gravitation acceleration)

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  4. Question 4

    This type asked 4 times: 19 Apr 2025 S2, 18 Apr 2026 S1, 15 May 2026 S1, 19 May 2026 S1. This one: 19 May 2026 S1 See all 4 of this type

    102
    In a certain system, the quantities A and B are measured as 8±0.088 \pm 0.08 and 6±0.066 \pm 0.06 respectively. Let x=AB,y=A+Bx = AB, y = A + B and z=A−Bz = A - B. The correct order of % error in xx, yy and zz is

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  5. Question 5

    Asked 3 times: 22 Apr 2025 S2*, 20 Apr 2026 S1*, 13 May 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked

    101
    The percentage error in the measurement of mass and speed are 2%2\% and 3%3\% respectively. The maximum error in the estimation of kinetic energy is

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  6. Question 6

    Asked 3 times: 20 Apr 2025 S2*, 26 Apr 2025 S1, 16 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    101
    The error in the measurement of length and mass of a cube is 3% and 4% respectively. The error in the measurement of its density will be

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  7. Question 7

    This type asked 3 times: 17 Apr 2026 S1, 19 Apr 2026 S1, 13 May 2026 S2. This one: 13 May 2026 S2 See all 3 of this type

    102
    The resistance of a conductor is R=V/IR = V/I where voltage V=100±5V = 100 \pm 5 V and current I=10±0.2I = 10 \pm 0.2 A. The error in the calculation of RR is

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  8. Question 8

    Asked 2 times: 11 Apr 2026 S2*, 12 May 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    101
    A quantity QQ is formulated X−2Y+32Z−25X^{-2}Y^{+\frac{3}{2}}Z^{-\frac{2}{5}}. X,YX, Y and ZZ are independent parameters which have fractional errors of 0.10.1, 0.20.2 and 0.50.5 respectively in measurement. The maximum fractional error of QQ is

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  9. Question 9

    Asked 2 times: 25 Apr 2025 S2*, 17 Apr 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    102
    A force 'F' is applied on a square plate of side 'L'. If the percentage error in determining 'L' is 3% and that in 'F' is 2% then the percentage error in determining the pressure is

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  10. Question 10

    Asked 2 times: 13 Apr 2026 S2*, 15 Apr 2026 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    101
    The length of rod is measured by meter scale having least count 0.10.1 cm and diameter is measured by vernier callipers having least count 0.010.01 cm. Length of rod is 5.05.0 cm and radius 2.02.0 cm. The percentage error in the calculated value of the volume is

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