Refer to the two magnetically coupled coils of Fig. 13.69(a). The polarity of the mutual voltage is:
(a) Positive
(b) Negative
Figure 13.69
Expert Solution & Answer
To determine
Choose the correct option, which is the polarity of the mutual voltage.
Answer to Problem 1RQ
The correct option from the given choices is (b)Negative_.
Explanation of Solution
Given data:
Refer to Figure 13.69(a) in the textbook for the two magnetically coupled coils.
Calculation:
Modify the Figure 13.69(a) by indicating positive and negative terminals and mentioning coils 1 and 2. The modified figure as shown in Figure 1.
Consider that the currents are denoted as i1 and i2. The mutual inductance between two coils is denoted as M.
In Figure 13.69(a), the current i1 enters at the dotted terminal of coil 1 and the voltage is negative in the dotted terminal of coil 2. Therefore, the mutual voltage Mdi1dt is negative.
Similarly, the current leaves at the dotted terminal of coil 2 and the voltage is positive in the dotted terminal of coil 1. Hence, the mutual voltage Mdi2dt is negative.
Therefore, the polarity of mutual voltage is negative. Hence, the option (b) is correct and option (a) is incorrect.
Conclusion:
Thus, the correct option from the given choices is (b)Negative_.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
single coil 600 turns instrument transformer, operating in the step-down mode with a 40 percent tap, supplies a 5 kVA, 0.88 power factor inductive load. The input to the transformer is 3.3 kV, 50 Hz. Assume that leakage effects and minor losses in transformer are negligible. Determine the following : (0) Turn ratio; (ii) Load current(in Amp); (iii) Incoming line current(in Amp); (iv) Transformed current (in Amp); (v) Apparent power conducted(in kVA)and (vi) Apparent power transformed"
3. Calculate the full-load primary and secondary currents of a 5 kVA, 2400/120 V, transformer.
Subject: Electrical Apparatus and Devices
Kindly answer
A coil has an inductance of 40 mH and negligible resistance. Calculate its inductive reactance and the resulting current if connected to (a) a 240V, 50 Hz supply, and (b) a 100V, 1 kHz supply
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.