Worksheetsunits & dimensions
Total questions: 20
Worksheet time: 10mins
What is a physical quantity?
A quantity that can be measured and expressed in units.
A concept that cannot be quantified.
A theoretical value without practical application.
A measurement that is always constant.
Dimension of impulse?
[M L T⁻¹]
[M L² T⁻²]
[M T⁻²]
[M L T⁻²]
Are leading zeros significant?
Yes, they are significant.
No, they are not significant.
Only in certain contexts.
They are always significant.
What is absolute error?
Difference between measured and true value.
The total error in a measurement process.
The average of all measurement errors.
The maximum possible error in a measurement.
Dimension of pressure?
[M L⁻² T⁻²]
[M L⁻¹ T⁻²]
[M L⁻¹ T⁻³]
[M L T⁻²]
What is a unit?
A standard used to express the measurement of a quantity.
A type of measurement tool.
A mathematical constant.
A unit of currency.
SI unit of luminous intensity?
Lumen (lm)
Lux (lx)
Candela (cd)
Watt (W)
Quantity with dimension [M⁰ L⁰ T⁰]?
Dimensionless quantity.
Mass quantity.
Length quantity.
Time quantity.
What is relative error?
Absolute error divided by true value.
True value divided by absolute error.
Absolute error plus true value.
True value minus absolute error.
Dimension of angular velocity?
[T⁻²]
[T⁻¹]
[L²T⁻¹]
[LT⁻²]
Is v=u+at² dimensionally correct?
Yes, it is dimensionally correct.
No, it is not dimensionally correct.
It is dimensionally correct under certain conditions.
It cannot be determined.
Can two different quantities have same dimensions?
No, they must have different dimensions.
Yes, but only in specific cases.
Yes (e.g., torque and energy)
No, dimensions are unique to each quantity.
Dimension of force?
[M L T⁻²]
[M L² T⁻²]
[M T⁻²]
[M L T⁻³]
Scientific notation of 0.0057?
5.7 × 10⁻³
57 × 10⁻⁵
0.57 × 10⁻²
5.7 × 10⁻²
Rule for multiplication of significant figures?
Result has the same number of significant figures as the number with the least.
Result should have one more significant figure than the number with the most.
Result should be rounded to the nearest whole number.
Result can have any number of significant figures.
Dimension of velocity?
[L T⁻²]
[L T⁻¹]
[L² T⁻¹]
[L T⁻³]
Define accuracy.
Closeness to the true value.
The ability to repeat measurements.
The average of a set of values.
The difference between the highest and lowest values.
Dimension of work?
[M L² T⁻²]
[M L T⁻²]
[M L² T]
[M T²]
Instrument with least count of 0.01 mm?
Vernier caliper
Micrometer screw gauge
Ruler
Tape measure
SI unit of amount of substance?
Gram (g)
Mole (mol)
Liter (L)
Kilogram (kg)
