Explanation

The current produced in a coil due to electromagnetic induction is called an induced current.

The induced current can be positive or negative depending on the direction of the change in magnetic flux and the orientation of the coil

However, the term "induced current" is used to refer to the current that flows

As a result of electromagnetic induction, regardless of its direction being positive or negative

Explanation

The correct way to write units is to use the SI (International System of Units) standard

Where the symbols for units named after persons are capitalized, and the symbols for other units are lowercase.

Therefore, the correct option is d. 43 kg m³. 

Explanation

The device that can be used for precise measurement of wavelength is a Michelson Interferometer. 

A Michelson interferometer uses the interference of light waves to measure very small distances, including wavelengths, with high accuracy. 

Explanation

 When an object moves at constant speed, its acceleration is zero.  

According to Newton’s Second Law:  

F = ma → If a = 0, then F = 0

Explanation

• The Milky Way galaxy is spiral in shape.
• It consisting of a central bar-shaped structure and a disk of stars, gas, and dust that spirals outward in a logarithmic spiral pattern.

Explanation

Photosynthesis splits water molecules (H2O) into oxygen (O2) and hydrogen ions (H+), releasing oxygen as a byproduct.

This process is essential for life on Earth, as it provides the oxygen that supports aerobic respiration in most living organisms.

Explanation

Long-sightedness is also known as hyperopia.

It is a vision defect where the image is formed beyond the retina, rather than directly on it.

This occurs when the eyeball is too short or the cornea is too flat, causing light to focus at a point behind the retina.

As a result, close objects appear blurry, while distant objects may remain clear.

Explanation

An echo is caused by the reflection of sound waves off a surface or object.

When sound waves reach a surface, some of the energy is reflected back, creating an echo.

This reflected sound wave then travels back to the listener, arriving later than the original sound, causing the echo effect.

Explanation

According to the kinetic molecular theory, the pressure exerted by a gas is caused by the bombardment of gas molecules on the walls of the container.

The gas molecules are in constant motion, colliding with each other and the container walls, resulting in a force exerted on the walls.

This force is what we experience as pressure.

Explanation

The critical velocity (vc) is the minimum velocity an object must have to orbit the Earth without falling to the ground.

It is given by the formula:

vc = √(gR)

where:

• g is the acceleration due to gravity (approximately 9.8 m/s²)
• R is the radius of the Earth (approximately 6,371 kilometers)