Explanation

Capacitance increases with larger plate area and better dielectric medium.

Capacitance decreases with greater separation between the plates.

Explanation

Heating a substance adds energy to its atoms or molecules.

This energy manifests as increased kinetic energy, making particles move faster.

Explanation

Light enters a room indirectly by reflecting off surfaces such as walls, floors, and objects.

Interference, diffraction, and polarization are special optical effects, not the main reason for daylight in a room.

Explanation

When sound waves pass into a different medium, their speed and wavelength change, but frequency remains constant.

Frequency is determined by the source of the sound, not the medium.

Explanation

The time period (T) of a simple pendulum:

T = 2π√L/g

It does not depend on the mass of the pendulum, only on length (L) and gravity (g).

Explanation

For liquids, as temperature increases, the viscosity decreases.

Higher temperature reduces intermolecular forces, making the liquid flow more easily.

Explanation

A body can have constant velocity only when moving in a straight line (rectilinear path) with constant speed.

Circular, elliptical, or parabolic paths involve change in direction.

Explanation

Momentum (p = mv) determines how difficult it is to stop an object.

For the same velocity, the object with greater mass has higher momentum and is harder to stop.

Explanation

When two vectors are at right angles, resultant 𝑅 is found using Pythagoras theorem:

R = √A² + B²

Here, A = 3N, B = 4N

R = √3² + 4² = √9 + 16 = √25 = 5N

Explanation

One micron (μm) is equal to 10⁻⁶ meters.

It is commonly used to measure microscopic particles like bacteria, pollen, and dust.