Question

Identify the expression for transformation ratio from the following.

(a) k = \(\frac {V_s}{V_p}=\frac {I_s}{I_p}=\frac {N_s}{N_p}\)

(b) k = \(\frac {V_s}{V_p}=\frac {I_s}{I_p}=\frac {N_p}{N_s}\)

(c) k = \(\frac {V_s}{V_p}=\frac {I_p}{I_s}=\frac {N_s}{N_p}\)

(d) k = \(\frac {V_p}{V_s}=\frac {I_s}{I_p}=\frac {N_s}{N_p}\)

I had been asked this question in my homework.

I would like to ask this question from Alternating Current topic in division Alternating Current of Physics – Class 12

Answer 1

The correct answer is (c) k = \(\frac {V_s}{V_p}=\frac {I_p}{I_s}=\frac {N_s}{N_p}\)

Easiest explanation: Transformation ratio (k) is defined as the ratio of number of turns in the secondary winding to the number of turns in the primary winding and the ratio of the current in the primary coil to the current in the secondary coil. It also defined as the ratio of voltage at the secondary terminal to the voltage at the primary terminals. The expression is given as:

k = \(\frac {V_s}{V_p}=\frac {I_p}{I_s}=\frac {N_s}{N_p}\)