A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is (a) 3500 mH (b) 350 mH (c) 250 mH (d) 150 mH
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A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of
inductance is
(a) 3500 mH
(b) 350 mH
(c) 250 mH
(d) 150 mH
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- Assume that the voltage drop across the resistor, ER, is 78 V; the voltage drop across the capacitor, EC, is 104 V; and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. Find the missing values. ET ER78V EC104V IT IR IC Z20 R XC VA P VARSC PF CFill in all the missing values. Refer to the formulas that follow. Resistance Capacitance Time constant Total time 150 k 100 F 350 k 35 s 350 pF 10 s 0.05 F 1.2 M 0.47 F 12F 0.05 s 86 k 1.5 s 120 k 470 pF 250 nF 100 ms 8 F 150 s 100 k 150 ms 33 k 4 F =RCR=CC=R Totaltime=5A coil having a 240V source has a current of 10.5 A when the frequency is set to 60 Hz. When the frequency is changed to 30 Hz, the resulting current is now 14.3 A. Find the inductance, L, of the coil (in mH).
- A 12 volt battery is connected to a simple series circuit where the inductance is 1/2 henrio and the resistance is 10 ohms. Determine the current if the initial current is 0. topic: ORDINARY DIFFERENTIAL EQUATIONSA coil of 20 ohms resistance has an inductance of 0.2 H and is connected in parallel with a 100 microfarad capacitor. Calculate the frequency at which the circuit will act as a non inductive resistance of R ohms. Find also the value of R.A coil has a capacitance of 23μF connected to 230 V, 50Hz supply. Calculate the capacitive reactance and resulting current.
- Two coils A and B are connected in series, and their effective inductance is 12.0H which the current direction is opposite to each other. However, when the connection of the coils are in the same direction of the current, the effective inductance is 8.0 H. If the coefficient of coupling is 0.6.a) Find the total inductance of inductively coupled circuits.b) Calculate the self-inductance of each coil and the mutual inductance.A coil having a resistance of 45ohms and inductance 0.4 H is connected in parallel to a 20 microF capacitor across 230, 50c/s mains. calculate the current taken from the mains.Two coils of inductance 6 H and 8 H are connected in parallel. If their coefficient of coupling is 0.435, calculate the equivalent inductance of the combination if (a) the mutual inductance assists the self-inductance, and (ii) the mutual inductance opposes the self-inductance.
- A coil of resistance 400Ω and inductance 0.20H is connected to a 75V, 400Hz supply. Calculate the power dissipated in the coil.Two coils of inductances 4 H and 6 H are connected in parallel. If their mutual inductance is 3 H. Calculate the equivalent inductance of the combination if mutual inductance assists and if mutual inductance opposes the self-inductance respectively.Two coils A and B are connectedin series, and their effective inductance is 12.0H which the current direction is opposite to each other. However, when the connection of the coils are in the same direction of the current, the effective inductance is 8.0 H. If the coefficient of coupling is 0.6.a) Find the totalinductance of inductively coupled circuits.b) Calculate the self-inductance of each coil and the mutual inductance.