Explanation

When white light passes through a prism, it splits into 7 colors, forming a spectrum known as a rainbow:

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

The separation of visible light into its different colours is known as dispersion.

Explanation

A microphone converts sound into a small electrical current.

Sound waves hit a diaphragm that vibrates, moving a magnet near a coil.

In some designs, the coil moves within a magnet.

Other microphones, such as condenser microphones, work on the principle of capacitance.

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VU FIA PAPER 18-12-2021

Explanation

Explanation

An electric generator works on the principle of electromagnetic induction.

Faraday's law states that a changing magnetic flux induces an emf, which is the working principle of generators.

Explanation

 An electric generator is a device that converts mechanical energy into usable electrical energy.

This process is based on the principle of electromagnetic induction,

Discovered in 1831 by British scientist Michael Faraday

Explanation

 A calorie is a unit of energy, specifically used to measure heat energy.

1 calorie is the amount of heat required to raise the temperature of 1 gram of water by 1°C.

In dietary terms, we use kilocalories (kcal) — where 1 kcal = 1000 calories — but it still measures energy, not diet or food itself

Explanation

When the 6d orbital is completely filled, the next electron enters the 7p orbital.

This is based on the Aufbau principle, which dictates that electrons first occupy the lowest energy levels available.

After the 6d orbitals (which can hold up to 10 electrons) are filled.

The 7p orbitals (which can hold up to 6 electrons) become the next lowest energy.

Explanation

Explanation

The capacity of an object to do work is called energy.

Energy can take many forms and is defined as the capacity a system or object has to perform work.

Explanation

My sister has been living in Paris for three years.

میری بہن تین سال سے پیرس میں رہ رہی ہے۔

We use "for" with a duration of time (e.g., for two hours, for ten years).