Explanation

Kinetic Energy (K.E) = ½ × mass × velocity² = ½ × 2 × (4)² = 1 × 16 = 16J

The formula directly gives 16 joules for the given mass and velocity.

Explanation

 Half-life definition:

The half-life of a radioactive substance is the time it takes for half of the atoms in a sample to decay. 

This decay process is inherent to the specific nucleus of the atom, meaning the half-life is a property of the substance itself and is independent of factors like the amount present or how old the sample is. 

Explanation

A P-N junction is the basic structure of a diode, and how it conducts current depends on how it's connected:

Forward bias:

The positive terminal of the battery is connected to the P-side, and the negative terminal to the N-side.

This reduces the potential barrier, allowing current to flow through the junction.

Explanation

Explanation

Mass is converted into energy (or vice versa), following Einstein’s equation: E=mc^2

Explanation

• Energy
• Momentum
• Charge

Explanation

Stress is defined as force per unit area:

Stress=Force/ Area ​

• The dimensions of force = MLT²

• The dimensions of area = L²

So:

Dimensions of Stress=MLT⁻²/ L⁻²−2​=ML⁻¹T⁻²

Explanation

 The combined effect of resistance and reactance in an electrical circuit is known as impedance.

Impedance, denoted by the letter 'Z',

Represents the total opposition to the flow of alternating current (AC) in a circuit.

It encompasses both resistance (opposition to current flow due to the material's properties) and reactance (opposition due to capacitance and inductance). 

Explanation

 At high frequencies, an RLC series circuit behaves like an RL circuit. 

At high frequencies, the inductive reactance (XL) becomes very large compared to the capacitive reactance (XC).

This means the circuit is dominated by the inductive behavior.

The circuit essentially behaves like a combination of a resistor and an inductor. 

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.