Explanation

• The SI unit of electric current is Ampere (A).
• Electric current measures the flow of electric charge.
• Defined using the elementary charge (e = 1.602176634 × 10⁻¹⁹ C).
• Named after: André-Marie Ampère (scientist).
• 1 Ampere = 1 Coulomb per second (1 A = 1 C/s).

Last verified on 08-06-2026

Explanation

• Wavelength is the distance between two successive crests or two successive troughs in a transverse wave.
• It represents one complete cycle of a wave.

Additional information:

• Symbol used: λ (Lambda)
• SI unit: meter (m)
• Wave formula: v = fλ
• Example wavelength values: 1 m, 0.5 m, 10 cm, 500 nm, 700 nm
• Visible light wavelength range: ~400 nm – 700 nm

Last verified on 12-03-2026

Explanation

Omniscient ہر چیز کا علم رکھنے والا 

To be omniscient is to know everything.

This often refers to a special power of God.

If you combine the Latin roots omnis (meaning "all") and scientia (meaning "knowledge"),

You'll get omniscient, meaning "knowledge of all."

Explanation

1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (MJ).

As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.

Explanation

She is interested in drawing. 

We use "interested in" because "in" connects the feeling of interest to the activity or subject someone cares about.

Pattern: be interested in + noun/verb-ing

Explanation

When a sound wave moves from one medium to another, the quantity that remains the same is its frequency. 

The frequency of a sound wave is determined by the source of the sound and doesn't change when it enters a different medium.

However, the wavelength and speed of the wave can change depending on the properties of the new medium. 

Explanation

In a reversible process, the entropy of the system remains constant. 

 A key characteristic of a reversible process is that it can be reversed without leaving any net change in the system or its surroundings, including the entropy. 

Explanation

Momentum is given by the formula: p = mv, where m is mass and v is velocity (or speed).

It depends on mass and speed, not on acceleration, so momentum is independent of acceleration.

Explanation

Momentum is the product of an object’s mass and its velocity → Momentum = Mass × Velocity.

Momentum is given by the formula: p = mv

It is a vector quantity.

It is conserved in closed systems during collisions.

It depends on mass and speed, not on acceleration, so momentum is independent of acceleration.

Explanation

A tuning fork is specifically designed to vibrate at a specific frequency,

And it resonates when struck, producing a sound wave at that particular frequency