Which of the following relations holds true in the case of the transformer having turns N₁ and N_2, voltage V₁ and V_2, and current I₁ and I₂ in primary and secondary coils respectively?

The correct answer is option 1):\(\rm \frac{V_1}{V_2}=\frac{N_1}{N_2}\)

Concept:

• 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 us to change (transform) the voltage from the primary
• The transformer has turns N₁ and N₂ voltages V₁ and V₂ and current I₁ and I₂ in primary and secondary coils respectively, the transformer ratio given as  $\rm \frac{V_1}{V_2}=\frac{N_1}{N_2}$ 

Additional InformationThe transformation ratio of the transformer is given by K = V2/V1 = E2/E1 = N2/N1.

Where N1 is the number of primary turns

V1 is the primary voltage

N2 is the number of secondary turns

V2 is the secondary voltage