Explanation

The magnitude of the current in metals being proportional to the potential difference across it, as long as the temperature of the conductor is kept constant, is known as Ohm's Law.

This law is expressed mathematically as V= I⋅R, where V is voltage, I is current, and R is resistance.

Explanation

In an AC generator, the angle between the magnetic field and the coil changes continuously as the coil rotates. This angle change determines the phase difference between the generated AC voltage and the magnetic field.

Explanation

Explanation

Climate models are used to describe and predict long-term weather patterns and trends.

They simulate the Earth's climate system to forecast future conditions based on historical data.

Explanation

A half-wave rectifier provides a pulsating DC output.

It is generally sufficient for charging batteries but not suitable for running AC motors or sensitive electronic devices.

Explanation

The best instrument for measuring the EMF of a cell is a potentiometer.

It provides a precise measurement by comparing the cell’s EMF with a known reference voltage without drawing current from the cell.

Explanation

If the radii of two droplets are in the ratio of 2:3, then their terminal velocities will be in the ratio of the inverse square of their radii. Since the terminal velocity is proportional to the square of the radius, the ratio will be:

(3/2)2 : (2/3)2 = 9/4 : 4/9.

Explanation

DNA (Deoxyribonucleic acid) is a large molecule made up of smaller units called nucleotides. Each nucleotide is composed of:

• A sugar molecule (deoxyribose)
• A phosphate group
• One of four nitrogenous bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T)