Explanation

In photovoltaic cells, the current increases with the intensity of incident light.

More light intensity means more photons, which release more electrons, generating higher current.

Explanation

The time period of a simple pendulum is independent of its mass.

It depends on length and acceleration due to gravity:

T = 2π√L/g

Explanation

According to the law of universal gravitation:

F ∝ (m1 × m2) / r^2

Initially, F0 ∝ (m × m) / r^2

After doubling the mass and halving the distance:

F_new ∝ (2m × 2m) / (r/2)^2

= 16 × F0

Explanation

The Fermi energy is the highest energy level that electrons occupy at absolute zero temperature.

Above this energy, states are empty, and below it, they are filled.

Explanation

Surface tension acts like a stretched membrane on the water's surface, and the surface tension along the blade's edges is greater than the blade's weight.

The force of surface tension acts tangentially to the liquid surface on the circumference of the blade.

Explanation

The moment of inertia depends on the mass of the object,

how the mass is distributed relative to the axis of rotation,

and the axis of rotation itself,

but it does not depend on the angular velocity.

Explanation

Louder sound is characterized by high amplitude.

Amplitude refers to the strength of the sound wave.

A higher amplitude results in a louder sound.

Explanation

• Satellites in orbit around the Earth use sensors and cameras to collect data and images of the planet's surface, atmosphere, and oceans.
• It enabling remote sensing applications such as land use mapping, crop monitoring, and natural disaster management.

Explanation

• A spacecraft is a man-made object designed to perform specific tasks in space.
• Such as exploration, communication, or research. 
• Examples of spacecraft include satellites, space stations, and probes.

Explanation

• A barometer measures atmospheric pressure by measuring the height of a mercury column that is supported by the pressure of the surrounding air.
• The higher the mercury column, the higher the atmospheric pressure.