3
Question
The input and output voltages of a transformer are 220 V and 44 V respectively. Find the turns ratio.
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Solution
The correct option is C 1:5
A transformer takes high-voltage electricity with a small current and changes it into low-voltage electricity with a large current, or vice versa. That is, step up or step down the voltage in a circuit. A step-up transformer turns low-voltage electricity into high-voltage electricity while dropping the current. A step-down transformer changes high-voltage electricity into low-voltage electricity.
If we change the number of turns in the coils we change the induced emf. This allows you to change (transform) the voltage from the primary to the secondary coil.
The Turns Rule is: NsNp=VsVp
Where,
Ns= number of turns on the secondary coil
Np= number of turns on the primary coil
Vs= voltage across the secondary coil
Vp= voltage across the primary coil
Hence, the ratio of input voltage to output voltage is equal to the ratio of the number of turns of primary coil to the number of turns of the secondary coil.
In the question given, the ratio of the input-output voltage is 220V44V. That is, 1:5.
Therefore, the turns ratio will also be 1:5.
A transformer takes high-voltage electricity with a small current and changes it into low-voltage electricity with a large current, or vice versa. That is, step up or step down the voltage in a circuit. A step-up transformer turns low-voltage electricity into high-voltage electricity while dropping the current. A step-down transformer changes high-voltage electricity into low-voltage electricity.
If we change the number of turns in the coils we change the induced emf. This allows you to change (transform) the voltage from the primary to the secondary coil.
The Turns Rule is: NsNp=VsVp
Where,
Ns= number of turns on the secondary coil
Np= number of turns on the primary coil
Vs= voltage across the secondary coil
Vp= voltage across the primary coil
Hence, the ratio of input voltage to output voltage is equal to the ratio of the number of turns of primary coil to the number of turns of the secondary coil.
Ns= number of turns on the secondary coil
Np= number of turns on the primary coil
Vs= voltage across the secondary coil
Vp= voltage across the primary coil
Hence, the ratio of input voltage to output voltage is equal to the ratio of the number of turns of primary coil to the number of turns of the secondary coil.
In the question given, the ratio of the input-output voltage is 220V44V. That is, 1:5.
Therefore, the turns ratio will also be 1:5.
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