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PART - 1 CH - 1 Units and Measurements Physics - PART - 1 CH - 1 Units and Measurements

Gujarat Board (GSEB) - STD 11 Science - Physics (GSEB - English Medium). 97 questions in this chapter.

Question types

PART - 1 CH - 1 Units and Measurements question types

97 questions across 8 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

97
Questions
8
Question groups
5
Question types
Sample Questions

PART - 1 CH - 1 Units and Measurements questions

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

Q 2M.C.Q (1 Marks)1 Mark
For one mole of gas, the dimensional formula of R in the equation PV = RT will be :
  • ✓
    $M ^1 L^2 T^{-2} K^{-1}$
  • B
    $M ^1 L^1 T^{-2} K^{-2}$
  • C
    $MLT ^2 K^{-1}$
  • D
    $ML ^2 T^2$

Answer: A.

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Q 5M.C.Q (1 Marks)1 Mark
Which of the following pairs of quantities have the same dimensions?
  • A
    Work and Power
  • B
    Density and Relative density
  • ✓
    Momentum and Impulse
  • D
    Stress and Strain

Answer: C.

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Q 151 Marks Question1 Mark
The speed of transverse wave in a wire is $v=\sqrt{\frac{ T }{m}}$, where T is the tension force, $m$ is the mass of unit length of the wire in $kg /$ meter and the velocity is in meter/ second. Find the unit of tension force.
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Q 162 Marks Questions2 Marks
If the escape velocity of a satellite at a height above the earth's surface is $v=\sqrt{\frac{2 G M}{R}}$. Then check the correctness of the formula.
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Q 172 Marks Questions2 Marks
The frequency of a tunning fork is given by $n=\frac{1}{2 l} \sqrt{\frac{T}{m}}$. Here resonance length is $l$, tension generated due to weight is $T$ and mass of unit length of wire is $m$. Check the correctness of this formula by dimensional method.
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Q 192 Marks Questions2 Marks
Write the significant figures of the following :
(i) 0.046
(ii) 4.000
(iii) $0 . 0 6 0$
(iv) $4.08 \times 10^6$
(v) 600700
(vi) 24600
(vii) 600 m
(viii) 7432
(ix) $6 2 1 2 . 0$
(x) 427.071
(xi) 0.0050
(xii) 0.00007032
(xiii) 0.4680
(xiv) 0.007
(xv) 0.046
(xvi) 946.860
(xvii) $0.04340 N / m$
(xviii) 46.000 m
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Q 213 Marks Question3 Marks
If the frequency (n) of a tunning fork depends on length (1), density (d) and Young's modulus of elasticity (y) then establish the correct formula.
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Q 223 Marks Question3 Marks
Velocity of sound in air is $v=\sqrt{\frac{ E }{d}}$. Check the correctness of this formula by dimensional method. Here $E$ is elasticity coefficient and $d$ is the density.
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Q 253 Marks Question3 Marks
The velocity of sound $v$ in the air depends on the air pressure, P and density of air $d$. Establish the possible formula by dimensional method :
$
v= K \sqrt{\frac{ P }{d}}
$
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Q 285 Marks Questions5 Marks
Establish a formula for converting the magnitude of a physical quantity from one unit system to another through the dimensional method. Convert one horse power to watts using the formula.
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Q 36Match the following.5 Marks
Column - AColumn - B
1. Dimension of torque(A) $Kg m^2 s^2$
2. $M ^1 L^{-1} T^{-2}$ is the dimension of(B) mgh
3. Write the dimensional unit of kinetic energy(C) $M L^2$
4. The dimensional formula of I is(D) $M ^1 L^2 T^{-2}$
5. Value of $\frac{1}{2} m v^2$ is equal to(E) Power
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Q 37Match the following.5 Marks
Column - AColumn - B
1. The value of 1 amu is(A) Radioactive dating
2. Which is most accurate watch?(B) $10^{-9}$
3. Which is the method of determining the age of rocks?(C) $1.66 \times 10^{-2} / kg$
4. How many nanoseconds are there in 1 second?(D) $M ^1 L^2 T^{-2}$
5. Dimension of angular momentum(E) Cesium
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