Question

what is amplifier amplify ?

Is transformer is an amplifier why ?

if voltage is increased N times and current increase N times what does it means ?


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Answer 1

• An amplifier amplify power.
• Transformer can increase or decrease voltage but not power so transformer is not amplifier . it is also an passive device.In transformer voltage is increased and x then current decrease by N Times so energy is conserved in an ideal transformer
• if voltage is increased N times then current decrease N times it means that energy is conserved.

:-)

Answer 2

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What is amplifier amplify ?

The power amplifier works on the basic principle of converting the DC power drawn from the power supply into an AC voltage signal delivered to the load. Although the amplification is high the efficiency of the conversion from the DC power supply input to the AC voltage signal output is usually poor.

Is transformer is an amplifier why ?

Transformer is not an amplifier, because:

Transformer is not an amplifier, because:The output and input powers are same and there is not any another source other than the signal (that is incoming AC voltage), Amplifier can amplify the signal voltage without reducing the output current.

If voltage is increased N times and current increase N times what does it means ?

Ohm's law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change