1. units,dimensions and measurement - Gujarat Board (GSEB) STD 11 Science Physics Questions

831

Questions

1

Question groups

5

Question types

01

M.C.Q (1 Marks)

831 Q→

Sample Questions

1. units,dimensions and measurement questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark

A force defined by $F=\alpha t^2+\beta t$ acts on a particle at a given time $t$. The factor which is dimensionless, if $\alpha$ and $\beta$ are constants, is:

✓
$\alpha t / \beta$
B
$\alpha \beta t$
C
$\alpha \beta / t$
D
$\beta t / \alpha$

Answer: A.

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Q 2M.C.Q (1 Marks)1 Mark

The quantities which have the same dimensions as those of solid angle are:

A
stress and angle
B
strain and arc
C
angular speed and stress
✓
strain and angle

Answer: D.

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Q 3M.C.Q (1 Marks)1 Mark

In a vernier callipers, $(N+1)$ divisions of vernier scale coincide with $N$ divisions of main scale. If $1 \mathrm{MSD}$ represents $0.1 \mathrm{~mm}$, the vernier constant (in $\mathrm{cm}$ ) is:

✓
$\frac{1}{100(N+1)}$
B
$100 \mathrm{~N}$
C
$10(N+1)$
D
$\frac{1}{10 \mathrm{~N}}$

Answer: A.

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Q 4M.C.Q (1 Marks)1 Mark

A metal wire has mass $(0.4 \pm 0.002)\,g$, radius $(0.3 \pm 0.001)\,mm$ and length $(5 \pm 0.02) \,cm$. The maximum possible percentage error in the measurement of density will nearly be $.......\%$