Explanation

Transformer works on Faraday's law of mutual induction.

Faraday's law of electromagnetic induction states that,

"When a change takes place in the magnetic flux which is linked with a circuit, an electromotive force current will induce in the circuit"

***

Transformers are used to change AC voltage levels

The transformer work only on an AC supply

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

The coefficient of variation (CV) is the ratio of Standard deviation and Mean.

CV = (σ / μ) × 100, where σ is the standard deviation and μ is the mean.

Explanation

Explanation

Across the periods of the periodic table, the shielding effect remains relatively constant.

This is because the number of inner shell electrons, which are responsible for shielding, does not change as you move across a period. 

Explanation

 When I met him, he was going to college.

The sentence is referring to a past event (When I met him),

So the action happening at that moment in the past should be in the past continuous tense: He was going to college.

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

The SI unit of stress is the Pascal (Pa), which is equivalent to Newtons per square meter (N/m²).

Therefore, the SI unit of stress is the same as that of pressure. 

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.