Explanation

Tides are primarily caused by the gravitational pull of both the Moon and the Sun.

The Moon has a stronger effect due to its proximity to Earth.

The Sun's gravitational influence also plays a significant role in the tidal patterns we observe.

Explanation

The escape velocity of a body in the gravitational field of Earth is primarily dependent on the mass of the Earth and the radius of the Earth.

It does not depend on the mass of the body or the angle at which it is thrown.

The formula for escape velocity 𝑣e is given by:

Explanation

Electric field intensity (E) is defined as force per unit charge: E = F/q.

So its unit is Newton/Coulomb (N/C).

Explanation

Electric current is defined as the rate of flow of charge through a conductor.

Its formula is 𝐼 = 𝑄/𝑡, where 𝐼 is current, 𝑄 is charge, and 𝑡 is time.

Explanation

The area under a force–displacement graph gives the work done by the force.

This is because Work = Force × Displacement, graphically represented by the area.

Explanation

An ammeter is always connected in series to measure the current flowing through a particular branch of the circuit.

This allows the ammeter to measure the entire current flowing through that branch, providing an accurate reading.

Explanation

The power (P) is given by:

P = VI

Given P = 100 W and V = 200 V, we can find the current (I):

100 = 200 × I

I = 100 / 200

= 0.5 A

Explanation

When moving with constant velocity, there is no net acceleration acting on the body.

Therefore, the apparent weight remains the same as actual weight — not changed.

Explanation

Biomass energy comes from plants, which get their energy through photosynthesis using sunlight.

So, the Sun is the original source of energy for all biomass.

Explanation

In electrical-mechanical analogies, mass (which resists acceleration) corresponds to inductance, which resists changes in current.

Just as mass stores mechanical energy, inductance stores magnetic energy.