Explanation

• Volt (V) is the SI unit of potential difference (voltage).
• Potential difference is the electrical force that causes current to flow through a conductor.
• It is measured using a voltmeter.
• The SI unit is named after Alessandro Volta.

Additional information:

• Electric Current: Ampere (A)
• Resistance: Ohm (Ω)
• Power: Watt (W)
• Charge: Coulomb (C)

Last verified on 03-06-2026

Explanation

• Sea water is denser than fresh water because it contains dissolved salts.
• The higher density produces a greater buoyant force, making objects float more easily.
• Fresh water contains much less dissolved salt, so its density is lower.
• This is explained by Archimedes' Principle.

Last verified on 03-07-2026

Explanation

• The Uncertainty Principle applies at the quantum level.
• It was proposed by Werner Heisenberg in 1927.
• It states that the exact position and momentum of a particle cannot be measured simultaneously with complete accuracy.

Last verified on 03-07-2026

Explanation

• When a moving car suddenly stops, the passenger's body tends to keep moving forward due to inertia of motion.
• This is explained by Newton's First Law of Motion.
• Only the car stops immediately; the passenger's body continues moving forward until restrained.
• Wearing a seat belt helps prevent injury by stopping the body safely.

Last verified on 03-07-2026

Explanation

• Weber (Wb) is the SI unit of magnetic flux.
• One Weber is equal to one volt-second (V·s).
• A magnetic flux density of 1 Weber per square metre (1 Wb/m²) is equal to 1 Tesla (T).
• Magnetic flux measures the total magnetic field passing through a surface.

Last verified on 03-07-2026