keiko builds a transformer in the lab, but it does not decrease the voltage as much as she needs. what…

keiko builds a transformer in the lab, but it does not decrease the voltage as much as she needs. what should keiko change to further reduce the voltage?\nshe should make the number of coils in the primary winding less than in the secondary winding.\nshe should make the number of coils in the primary winding the same as in the secondary winding.\nshe should increase the number of coils in the secondary winding.\nshe should increase the number of coils in the primary winding.

keiko builds a transformer in the lab, but it does not decrease the voltage as much as she needs. what should keiko change to further reduce the voltage?\nshe should make the number of coils in the primary winding less than in the secondary winding.\nshe should make the number of coils in the primary winding the same as in the secondary winding.\nshe should increase the number of coils in the secondary winding.\nshe should increase the number of coils in the primary winding.

Answer

Brief Explanations:

The voltage - transformation ratio in a transformer is given by $\frac{V_p}{V_s}=\frac{N_p}{N_s}$, where $V_p$ and $V_s$ are primary and secondary voltages respectively, and $N_p$ and $N_s$ are the number of turns in the primary and secondary windings respectively. To decrease the secondary voltage $V_s$ for a given primary voltage $V_p$, we need to increase the ratio $\frac{N_p}{N_s}$. This can be done by increasing $N_p$ (the number of coils in the primary winding).

Answer:

She should increase the number of coils in the primary winding.