Units and Measurements

The SI unit of electric current is:

1. Volt
2. Ampere
3. Ohm
4. Coulomb

The error in measurement caused due to faulty calibration of an instrument is called:

1. Random error
2. Systematic error
3. Personal error
4. Calculation error

Which of the following is dimensionless?

1. Force
2. Strain
3. Velocity
4. Pressure

The number of significant figures in 100.0 is:

1. 1
2. 2
3. 3
4. 4

The dimensional formula of energy is:

1. [MLT⁻¹]
2. [ML²T⁻²]
3. [ML²T⁻¹]
4. [M²LT⁻²]

The least count of an instrument represents:

1. Maximum measurement
2. Smallest measurement it can measure
3. Average measurement
4. Total error

Which of the following is a derived quantity?

1. Length
2. Mass
3. Time
4. Acceleration

The value of 1 nanometre is:

1. 10⁻³ m
2. 10⁻⁶ m
3. 10⁻⁹ m
4. 10⁹ m

The dimensional formula of force is:

1. [MLT⁻²]
2. [ML²T⁻²]
3. [M²LT⁻²]
4. [LT⁻¹]

The SI unit of time is:

1. Hour
2. Minute
3. Second
4. Day

Which instrument is used to measure very small distances accurately?

1. Metre scale
2. Vernier calipers
3. Thermometer
4. Barometer

The dimensional formula of velocity is:

1. [LT⁻¹]
2. [LT⁻²]
3. [MLT⁻¹]
4. [M²LT⁻¹]

Which of the following is a fundamental quantity?

1. Velocity
2. Force
3. Mass
4. Density

The SI unit of length is:

1. Centimetre
2. Metre
3. Kilometre
4. Millimetre