Explanation

Silicon (Si) is the element most commonly used to fabricate solar cells and transistors.

Silicon is a semiconductor material that is widely used in the production of electronic components, including:

• Solar cells (photovoltaic cells)
• Transistors
• Microprocessors
• Diodes

Explanation

She is suffering from a fever.

وہ بخار میں مبتلا ہے۔

We use "from" here because it indicates the cause of the suffering.

"Suffering from" is a common collocation in English that denotes experiencing a particular condition or ailment.

Explanation

• When an object reflects all the component colors of light, it appears white.
• This is because the object is reflecting all the wavelengths of visible light, which are then perceived by our eyes as white.
• If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black.

Explanation

The Chaukhandi graves are located 29 km east of Karachi, Sindh province of Pakistan.

They are famous for their delicate stone carvings with intricate geometric patterns.

Explanation

Jupiter, Uranus, and Neptune have rings, too.

But Saturn's rings are the biggest and brightest.

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Explanation

Bleaching powder is synthesized by reacting chlorine gas with calcium hydroxide (Ca(OH)₂).

The chemical formula of bleaching powder is Ca(OCl)Cl.

Explanation

A voltmeter is used to measure the potential difference (voltage) across two points in a circuit.

It is connected in parallel with the component whose voltage is being measured.

Explanation

The surface area of a sphere depends only on the radius (r) and is given by the formula 4πr².

This formula comes from calculus and represents the total area covering the outer layer of a perfect sphere.

Explanation

36 is a composite number as it has factors other than 1 and itself.

Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36.

Explanation

کنایہ کے لغوی معنی ہیں ڈھکی چھپی یا پوشیدہ بات۔

ادبی اصطلاح میں ایسی بات جو براہِ راست نہ کہی جائے بلکہ اشارے یا علامت سے سمجھائی جائے، کنایہ کہلاتی ہے۔