A coil draws 1800W when connected to a 120V dc source. It consumes 3000W when used on a 200V, 60Hz ac source. Find the inductance of the coil.
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Q: ► Write the Boolean equation for each of the logic gate circuits: ▶ A C D 6 (0) D 8 C D (b) D
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- An inductive coil with resistance R and inductance L is connected in parallel with a 40-ohm resistance. The combination then is connected across a 50Hz source. If the currents in the coil and the 40-ohm resistor are 7∟-53 A and 5 A respectively. What is the inductance of the coil?If a circuit consisting of a resistor and induction in series has a DC current of 500mA following through it, andthe switch in the circuit is suddenly open. What is the Inductive spike voltage induced in the inductor if thecurrent reaches 0 A in 200 x 10-6 sec (200 micro second) and the Inductance, L =100mH? Hint: { Vemf =L di/dt}a) 250 V b) 500 V c) 1000V d) 10 VA 0.8H inductor is connected in series with a 7.0ohm resistor. If the connection is enegized form a 10-V DC source, determine the voltage(in volts) across the inductor at t = 2.5ms/ The initial current is 150mA.
- A coil has an equivalent circuit of inductance 1.5 H in series with resistance 90 ohm. It is connected across a charged 5µF capacitor now when the capacitor voltage is 10V. Determine the nature of the response and obtain an expression for the current in the coil.A coil used for control applications is being supplied by a 24-V DC supply. When the coilis disconnected from the source using a switch, sparks occur at the switch. In an attemptto solve this problem, a 100 microfarad capacitor is connected in parallel to the coil. Ifthe coil has an inductance of 0.1 Henrys and a resistance of 20 Ohms, explain if theaddition of the capacitor helped solve the problem. Determine the voltage across theswitch to aid your explanation.An inductor with incuctance L is in an AC circuit. Assuming that the current in the inductor varies a IL(t) = I0cos(omegat), find the voltage VL(t) that must be driving the inductor. Use the cosine function.
- A coil having a resistance of 10 Ω and an inductance of 4 H is switched across a 20-V dc source. Calculate the time taken by the current to reach 50% of its final steady value.A coil with a self-inductance of 16 mH and a resistance of 6 Ω is connected to an AC source whose frequency can be varied. At what frequency will the voltage across the coil lead the current through the coil by 45°?A 1-H inductor is connected in series with a 6-ohm resistor. If the connection is energized from a 9-V DC source, determine the current (in amperes) through the circuit for a long time. The initial current is 100 mA. Express your answers accurate to four decimal places. No need to put the units.
- A 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).With the assumption that the switch in the circuit of given figure has been closed a long, long time. Compute the current flowing through the inductor at t=78.8usAn AC circuit contains a 24-Ω resistor, a 15.9-mH inductor, and a 13.3-µF capacitor connected in parallel. The circuit is connected to a 240-V, 400-Hz power supply. Find the following values. XL = XC = IR = IL = IC = P = VA R sL = VA R sC = IT = VA = PF = ∠ θ =