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A big difference. A transformer converts power into more useful means of transportation or matching to the end results.
Pincoming = IPVP = Poutgoing = ISVS.
giving the ideal transformer equation
Vs/VP= Ns/NP=IP/Is
then as the outgoing voltage of the transformer increase, the outgoing current will decrease. An amplifier adds power. For example, voltage amplifier add voltage (amplify) independent the amplifier current.
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RossAmplifiers are used to strengthen the input signals in terms of current,voltage. Transformers are also used for same purpose but here we can reduce as well which can not be performed by AMPLIFIERS.
A transformer does not amplify a signal. A transformer transforms the power fed into one side to the exact same power on the other side (minus internal losses).
A voltage amplifier is typically used to amplify small signals, such as from a microphone. A microphone may produce 50 mV, and may be able to drive 1mA of current. If this is fed into a voltage amplifier, the amplifier will change the 50mV signal to a larger voltage (assume amplifier gain of 20x) such as 1 volt. The current driving capability is dependent upon the amplifier design, but typically would be more than a microphone. A voltage amplifier is often followed by a current amplifier, which will keep the voltage almost the same, but can drive significantly more current; this can then be fed to a speaker.
If you attempted to do the exact same thing with a transformer (20:1 turns ratio), you would feed the 50mV and 1mA signal into the input, and get a 1V and 5 microamp signal output (the POWER stays the same). This would not be enough current to drive a speaker, although the voltage is greater.
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Is transformer an amplifier?
No. In an amplifier, Power Out > Power in. In a transformer Power Out ~= Power In (minus internal losses). An AC generator is more like an amplifier than a transformer.
Can you use transformer in place of amplifier?
A transformer is a passive device while an amplifier is an active device. a transformer can amplify voltage but never power WHILE AN AMPLIFIER CAN amplify power's can you use it sure withing the limitation of the transformer and only to amplify volts.
Which coupling gives high gain in case of amplifier?
no.transformer coupling gives higher gain
What is the formula for gain in a power amplifier that has a step down transformer?
A: there is no formula the gain of the amp is just reduced by the transformer turn ratio minus efficiency or loss. the transformer is for isolation and impedance matching
Why transformer is not called an amplifier?
In an ideal transformer the power in equals the power out there is no gain. In an ideal amplifier the power out equals the Gain *Power In. An ideal transformer transforms energy at a ratio of its windings. For example an ideal 1:10 ratio transformer (step up) would convert a 10Volt input at 10amps to a 100Volt output at 1Amp. Or conversely an ideal 10:1 ratio transformer (step down) would convert a 10Volt 10Amp input into a 1Volt 100Amp output. Since Power = Voltage * Current we can see the power in equals the power out in an ideal transformer. In an ideal amplifier the power out is greater than the power in. This is defined as the gain of the amplifier. An ideal amplifier with a Voltage gain of 10 would take a 1Volt 1amp signal and amplify it into a 10Volt 1 amp signal. An ideal amplifier with a Current gain of 10 would take a 1Volt 1Amp signal and amplify it into a 1Volt 10 amp signal. Since Power = Voltage * current we can see the power in is less than the power out showing a gain in power.
