Physics Units: 25 MCQs with answers

metre

The SI unit of length is the **metre** (symbol m), as listed in the table.

Mass

**Mass** has the SI unit kilogram (kg), as shown in the table.

kelvin

The SI unit of temperature is the **kelvin** (symbol K), as listed in the table.

newton

The SI unit of force is the **newton** (symbol N), as listed in the table.

Work

**Work** has the SI unit joule (J), as shown in the table.

watt

The SI unit of power is the **watt** (symbol W), as listed in the table.

pascal

The SI unit of pressure is the **pascal** (symbol Pa), as listed in the table.

Frequency

**Frequency** has the SI unit hertz (Hz), as shown in the table.

ampere

The SI unit of electric current is the **ampere** (symbol A), as listed in the table.

coulomb

The SI unit of electric charge is the **coulomb** (symbol C), as listed in the table.

True

According to the table, the SI unit of time is the **second** (symbol s).

False

The SI unit of energy is the **joule** (J), not the newton. The newton is the unit of force.

Kilogram (kg)

The SI unit of mass is the kilogram (kg), which is the standard unit used to measure mass in the International System of Units.

Electric Charge

The Coulomb (C) is the SI unit of electric charge, representing the quantity of electricity transported in one second by a current of one ampere.

Hertz (Hz)

The SI unit of frequency is the hertz (Hz), which measures the number of cycles per second of a periodic phenomenon.

Joule (J)

The SI unit of work is the joule (J), defined as the work done when a force of one newton displaces an object by one meter.

Temperature

The Kelvin (K) is the SI unit of temperature, used to measure thermal energy and temperature in scientific contexts.

Volt (V)

The volt (V) is the SI unit of electric potential, representing the potential difference that would drive one ampere of current against one ohm of resistance.

Pressure

The pascal (Pa) is the SI unit of pressure, defined as one newton per square meter.

Candela (cd)

The candela (cd) is the SI unit of luminous intensity, measuring the power emitted by a light source in a particular direction.

Amount of Substance

The mole (mol) is the SI unit for the amount of substance, representing a specific number of entities, typically atoms or molecules.

Meter per second (m/s)

The meter per second (m/s) is the SI unit of velocity, indicating the distance traveled in meters per unit of time in seconds.

metre per second

The SI unit of speed is **metre per second** (m s$^{-1}$), as listed in the table.

metre per second squared

The SI unit of acceleration is **metre per second squared** (m s$^{-2}$), as listed in the table.

Momentum

**Momentum** has the SI unit kilogram metre per second (kg m s$^{-1}$), as shown in the table.