-if the primary to secondary turns ratio is 9:1 and a 1 kΩ load resistor is placed in the secondary, the reflected resistance seen by the primary equals .
A)162 kΩ
B)1 kΩ
C)111 Ω
D)81 kΩ

Question

-if the primary to secondary turns ratio is 9:1 and a 1 kΩ load resistor is placed in the secondary, the reflected resistance seen by the primary equals .
A)162 kΩ 
B)1 kΩ 
C)111 Ω 
D)81 kΩ

Quizplus · Accepted Answer

The reflected resistance is calculated by multiplying the secondary resistance by the square of the turns ratio: $ (9^2) \times 1 \text{ kΩ} = 81 \text{ kΩ} $.

-If the Primary to Secondary Turns Ratio Is 9:1 and a 1