Explanation

• Mass and Length are base quantities in SI units.
• Length SI Unit: meter (m)
• Mass SI Unit: kilogram (kg)

Additional information:

Base Quantities in SI System:

• Time (second)
• Electric current (ampere)
• Temperature (kelvin)

Last verified on 16-06-2026

Explanation

• A voltmeter measures potential difference (voltage) between two points in a circuit.
• To do this correctly, it must be connected in parallel with the component across which the voltage is to be measured.

Last verified on 28-10-2026

Explanation

• An ammeter measures the electric current flowing through a circuit.
• It is connected in series so that the same current flowing through the circuit also passes through the ammeter.
• An ammeter has very low resistance to minimize its effect on the current being measured.

Additional information:

• A voltmeter, in contrast, is connected in parallel to measure the potential difference across a component.

Last verified on 28-10-2026

Explanation

• Impulse J=F⋅Δt represents the change in momentum of an object.
• It is directly proportional to the force applied and the time duration of application.
• Impulse measures the effect of force over a time interval.

Last verified on 28-10-2026

Explanation

• Water (H₂O) is a polar solvent due to its asymmetrical molecular structure.
• It results in a slightly positive charge on the hydrogen atoms.
• A slightly negative charge on the oxygen atom.

Last verified on 28-10-2026