Explanation

Copper, silver, aluminum, gold, steel, and brass are common conductors of electricity.

The most highly conductive metals are silver, copper, and gold

Silver is the first-best conductor of heat.

Copper is the second-best conductor of heat.

Explanation

The Earth bulges at the equator and rotates, creating a centrifugal force that slightly reduces gravity there.

At the poles, this effect is minimal, so ‘g’ is stronger at the poles than at the equator.

Explanation

Waves produced by oscillation of material particles require a medium to travel, called mechanical waves.

Examples include sound waves and water waves.

Explanation

Direct current is produced when electrons flow constantly in one direction.

It's abbreviated as "DC".

Since direct current flows in one direction only, its electrical pressure or voltage is always oriented in one direction, or "polarity".

Explanation

Explanation

Time period T = 1/frequency 1/0.5 = 2 seconds.

The time period is the time taken for one complete oscillation.

Explanation

A dull black surface absorbs maximum radiation because it doesn’t reflect or transmit light.

Such surfaces are used in experiments and devices like blackbody radiators for accurate heat absorption.

Explanation

An ideal teacher not only imparts knowledge but also mentors and supports students emotionally and intellectually.

Being a friend, philosopher, and guide helps build trust and inspires lifelong learning.

Explanation

فصلوں کی آب پاشی کے چار بنیادی طریقے ہوتے ہیں: سطحی، بارانی، چھڑکاؤ، اور قطرہ قطرہ۔

ہر طریقہ زمین، فصل اور پانی کی دستیابی کے لحاظ سے استعمال ہوتا ہے۔

Explanation

عرش کا مطلب ہے اونچا مقام یا آسمانی تخت، جب کہ فرش نیچے کی سطح کو کہتے ہیں۔

اس لیے عرش اور فرش ایک دوسرے کے ضد (متضاد) ہیں۔