Explanation

Sound wave is a mechanical  wave.

Electromagnetic waves are waves that consist of oscillating electric and magnetic fields

That propagate through space without needing a medium.

Sound waves, on the other hand, are mechanical waves that require a medium (like air, water, or solids) to travel through. 

Explanation

My cousin is a doctor.

While my brother is an author.

"A/an" is used to refer to a non-specific or non-particular member of the group.

Explanation

• Canal Lock: A hydraulic structure used to raise or lower boats between different water levels.
• It works like a water elevator.
• It has a closed chamber and gates.
• The chamber is filled or emptied with water to move boats.

Explanation

Explanation

A battery is a device that can store:

• electrical energy in the form of chemical energy,

• and convert that energy into electricity

However, when a storage battery is being used in UPS it needs charging. 

At the time of charging the conversion of electrical energy into chemical energy is observed.

Explanation

Explanation

The force on a moving charge in a uniform magnetic field depends on:

• Magnetic flux density (B): The strength of the magnetic field.
• The charge on the particle (q): The amount of charge on the particle.
• The speed of the particle (v): The velocity at which the particle is moving.

The force (F) on a moving charge in a uniform magnetic field is given by the Lorentz force equation: F = q (v x B)

Where x denotes the cross product.

Explanation

Explanation

We use "read(s)" based on the subject and tense of the sentence.

Explanation

She wears a uniform