While measuring acceleration due to gravity by a simple pendulum, a student makes a positive error of 1% in the length of the pendulum and a negative error of 3% in the value of time period. The percentage error in the measurement of g is:
If pressure P, velocity v and time T are taken as fundamental physical quantities, then dimensional formula of force is:
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From pressure × area, express mass and length in terms of P, v and T. The printed options appear inconsistent with the dimensional result.
One milli is equal to:
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Milli represents one-thousandth.
In scientific notation 0.0001 will be written as:
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Move the decimal point four places to the right.
Number of significant figures with increasing accuracy of the measuring instrument:
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A more accurate measuring instrument can resolve more digits.
If length (L), mass (M) and force (F) are taken as fundamental quantities, then the dimensions of time will be:
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Use F = MLT⁻² and solve for T.
Radian is unit of:
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The radian measures a plane angle.
If the error in the measurement of radius of a circle is 1% then the error in the measurement of its area will be:
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Area is proportional to r².
Significant figures in 0.0322 are:
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The leading zero is not significant; 3, 2 and 2 are significant.
A force F is applied on a square plate of side L. If the percentage error in the determination of L is 2% and that in F is 4%, then permissible error in pressure is:
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Pressure is F/L², so the error in L is multiplied by 2.
A science student takes 100 observations in an experiment. Second time he takes 500 observations in the same experiment. By doing so the possible error becomes:
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Use the relationship intended by the source between possible error and number of observations.
Candela is the unit of:
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Candela is the SI base unit for luminous intensity.
The length, breadth and thickness of sheet are 3.233 m, 2.105 m and 1.05 m respectively. Volume of sheet up to the appropriate significant digits is:
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Multiply the three measurements and retain the appropriate number of significant figures.
The fundamental quantities which form the base for the SI system are:
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Mass, length and time are fundamental quantities in the classical SI base set used here.
One (atto) is equal to:
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Atto represents a factor of 10⁻¹⁸.
Significant figures in 0.00467 are:
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Leading zeros are not significant.
Total fractional uncertainty in the period T = 2π√(l/g) will be equal to the:
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For a quantity involving a product/quotient of powers, fractional uncertainties are combined according to the powers.
Which is a base unit?
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Second is one of the SI base units.
Which of the following is derived quantity?
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Force, velocity and acceleration are all derived quantities.
Which of the following is a derived quantity?
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Velocity is derived from length and time.
