A resistor of 250Q, is connected in series with a 1.5 H inductor, cross a 100 V, 50 Hz supply. Calculate (a) the current flowing, (b) the circuit phase angle, (c) the p.d. developed across each component and (d) the power dissipated.
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- Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?Determine, in polar and rectangular forms, the current flowing in an inductor of negligible resistance and inductance 159.2 mH when it is connected to a 250V, 50 Hz supply.Calculate the capacitance and charging current of a single-core cable used on a 3-phase, 66 kV system. Thecable is 1 km long having a core diameter of 10 cm and an impregnated paper insulation of thickness 7 cm. Therelative permittivity of the insulation may be taken as 4 and the supply at 50Hz.
- a. State the peak, angular frequency, ω, and phase values for voltage source, VS b. Express the voltage source, VS , as a phasor c. Calculate the reactance, XL1 , of the inductor, L1A parallel circuitcomprisestwo branches, (i) a coil of resistance 20 Ω and inductance 0.07 H and (ii) a capacitance of 60 μF in series with a resistance of 50 Ω. Calculate the current in the mains, active-, reactive-powers,and the power factor of the arrangement when connected across a 200V, 50Hz supply.a) You are provided with three capacitors of values 4µF, 6µF, 30µF and 220V power supply. Connect the 4µF and 6µF in parallel; and then connect the combination to the 30µF in series. Connect the 220V power supply across this arrangement and find (i) the equivalent capacitance of the circuit formed, (ii) the voltage across 30µF, (iii) the charge on each capacitor. (iv) If the circuit formed is switched ON for 3minutes, what will be the amount of current flowing through the circuit? (b) What is the accuracy of a measurement of 26.5gm taken as against 25gm? (c) State the types of resistor colour band in use and hence determine the colours of the following resistors: (i) K39±10%; (ii) M56±1%; (iii) 3K9±10%; (iv)120K±2% (v) 8R8±10%
- Assume that steady state DC conditions exist. A. Determine the energy stored in each capacitor and every inductor. & B. Verify power balance in the circuit, namely power generated by the source equals the power absorbed by the circuit elements.If a circuit is connected to a voltage source of 1sin(10t + 84 degrees) and Capacitance(C) = 2F, Resistance(R) = 6 Ohms and Inductance(L) = 5H. Find the instantaneous current flowing in the circuit at time t = 0.46 seconds. - Capacitor, Resistor and Inductor connected in seriesThe following parameters are used in an EDM process, the supply voltage is 150V. The resistance and capacitance in the circuit are 50 Ohms and 15 microfarads respectively. The tool is made of brass and kerosene is used as the dielectric. A hole diameter of 20 mm is to be cut into a plate of thickness of 3mm. If the discharge takes place at maximum power conditions. The value of constant K4=0.18, calculate the MRR, and machining time.
- A current of 5A flows in a resistor of 2 ohms. 18 kJ is the energy dissipated in 300 seconds in the resistor. True/False Linear Circuit is the one whose parameters are not constant. True/False Choke is used to limiting the current flowing through it. True/False In an Inductive circuit, relationship between inductance (L) is directly proportional to the inductive reactance (XL). True/FalseA series circuit consists of a resistance of 10 ohms, an inductance of 200/π mH, and capacitance of 1000/π μF. Calculate (a) the current flowing in the circuit if the supply voltage is 200 V, 50 Hz, (b) the power factor of the circuit, (c) the power drawn from the supply. Also, draw the phasor diagram.Consider the Capacitance = 10uF, Vpeak of +13v during the positive half cycle and -7v during the negative half cycle. If we have a charging time of 18ms, calculate the Forward Resistance of the circuit in ohms. Calculate the Vout during the negative half cycle. Calculate the Vout during the positive half cycle. Calculate the Discharging time of the circuit in seconds.