Explanation

Explanation

The photoelectric effect best explains the particle nature of light. 

Explanation

sp hybridization: When one s orbital and one p orbital mix, they form two sp hybrid orbitals.

These hybrid orbitals are oriented linearly (180 degrees apart) from each other.

This linear geometry is characteristic of molecules with only two electron groups around a central atom.

Examples include acetylene (C2H2) and carbon monoxide (CO). 

Explanation

 A PN junction diode allows current to flow only in one direction — from P to N (forward bias).

During the positive half cycle of AC, the diode is forward-biased (low resistance), so current flows.

During the negative half cycle, the diode is reverse biased, so it blocks current and offers high resistance.

Explanation

The correct phrasal verb is "run over", meaning hit by a vehicle.

So, "He was run over by a car" is the right usage.

Explanation

 The wave nature of light was primarily proposed by Christian Huygens.

Explanation

• Resistivity (ρ) is a material property — it depends only on the type of material and its temperature.

• It does not depend on the length or cross-sectional area of the conductor.

Formula to clarify:

R=ρ⋅L/A​

• Here, $R$ is resistance, $L$ is length, $A$ is area, and $rho$ is resistivity.

• Length and area affect resistance, not resistivity.

Explanation

Cut your coat according to your cloth.

Explanation

The dual character of matter particles in motion was postulated by De Broglie. 

Louis de Broglie proposed the idea that particles like electrons could behave not only as particles but also as waves, a concept known as wave-particle duality

Explanation

A disjunction p ∨ q is false only when both p and q are false.