Answer:
The equivalent resistance referred to the secondary winding (R_eq2) is approximately 0.01 ohm (option d).
Step-by-step explanation:
To find the equivalent resistance referred to the secondary winding, we can use the concept of impedance transformation in transformers. The equivalent resistance referred to the secondary winding (R_eq2) can be calculated as follows:
R_eq2 = R2 + (R1 * (V2 / V1))^2
Where:
R2 = Secondary winding resistance (0.005 ohm)
R1 = Primary winding resistance (1.5 ohm)
V2 = Secondary winding voltage (100V)
V1 = Primary winding voltage (2000V)
Let's plug in the values and calculate:
R_eq2 = 0.005 + (1.5 * (100 / 2000))^2
R_eq2 = 0.005 + (1.5 * 0.05)^2
R_eq2 = 0.005 + (0.075)^2
R_eq2 = 0.005 + 0.005625
R_eq2 = 0.010625 ohm
Now, let's check the answer choices:
a. 0.875 ohm - Not the correct answer.
b. 0.0875 ohm - Not the correct answer.
c. 0.00875 ohm - Not the correct answer.
d. 0.01 ohm - This is the correct answer.
The equivalent resistance referred to the secondary winding (R_eq2) is approximately 0.01 ohm (option d).