Electromagnetic Induction

What is electromagnetic induction?

The process of producing current in a closed coil due to the relative motion between magnet and coil is called electromagnetic induction.

Why can't a transformer be used to change the value of DC voltage?

A transformer relies on the principle of electromagnetic induction, which works with changing magnetic fields. Since direct current (DC) has a constant magnitude and does not change direction, it does not create the varying magnetic field necessary for induction in a transformer. Therefore, transformers are not suitable for altering the value of DC voltage.

Differentiate between.Live wire and the neutral wireAC and DCFilament and fluorescent lampDynamo and electric motorStep up and step down transformerTungsten and nichromeElectricity obtained from ge...

a. Live wire and neutral wire.

Live wire	Neutral wire
It carries current to the device from the source.	It carries current from the device to the source.
It is red or brown in color.	It is black or blue in color.

b. AC and DC.

AC	DC
The current that changes magnitude and polarity is called AC.	The current that doesn't change magnitude and polarity is called DC.
It is produced by an AC generator.	It is produced by cells, batteries, etc.
It has a non-zero frequency.	It has a zero frequency.

c. Filament and...