A transformer has $100\%$ efficiency. Which pair of equations are both correct for the transformer?
- A$I_p V_p = I_s V_s$ and $\frac{V_p}{N_p} = \frac{V_s}{N_s}$
- B$\frac{V_p}{I_p} = \frac{V_s}{I_s}$ and $N_p V_p = N_s V_s$
- C$\frac{V_p}{I_p} = \frac{V_s}{I_s}$ and $\frac{V_p}{N_p} = \frac{V_s}{N_s}$
- D$I_p V_p = I_s V_s$ and $N_p V_p = N_s V_s$