Convert the following to Watts: -117 dBm, -43 dBm, -95 dBm, 11 dBm, -78 dBm
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- The current waveform is 10 sin (ωt + 90) and that of the voltage is 25 cos (ωt - 90). What is the angle difference between the voltage and current?What is the complex expression for a given alternating current i = 250 sin(wt-25 deg)?Determine the current in the circuit if inductance is equals to 1 H Answer: i = 0.25 sin(120t-90o) A
- What is the average voltage of an alternating voltage, v = 100sin120πt?A moving coil ammeter and a moving iron ammeter are connected in series with arectifier across 110V (r.m.s.) AC supply. The total resistance of the circuit in theconducting direction is 60 ohm and that in the reverse direction may be taken asinfinity. Assuming the waveform of the supply voltage to be sinusoidal, calculate thereadings in each ammeterDetermine the current in the circuit if inductance is equals to 200μH Answer: i = 133.92 sin(112t-90o) A
- For the Photoflash unit. Vse 9V. RISKO C-1500 uf. R2= 120. The average power dissipated by the lamp is High voltage de supply 6.75W 8.3W 0.675W 10W 0.6W The mutual inductance sign for the following circuit is 352 www Negative R₂ Positive 2 mH 3 mH ell 5 mH www 10 ΩDetermine the current in the circuit if inductance is equals to 10 mH Answer: i = 5.31 sin(377t-90o) AIf the applied voltage across a series RL circuit is 120V and the voltage across the resistor is measured to be 90V, the power factor for the circuit is ... a) 0.65 b) 0.90 Oc) 0.75 d) 1.00
- 1. Determinewhether each diode in figure 1 is forward biased or reversed biased. 2. Determine the voltage across each diode in figure 1, assuming the practical diode.You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a current draw of 36 amperes at full load. The motor is connected to a 480-volt line. A three-phase wattmeter indicates a true power of 22 kW. Determine the power factor of the motor and the amount of capacitance needed to correct the power factor to 95. Also determine the minimum voltage rating of the capacitors. The capacitors are to be connected in wye.What is the power factor of the circuit in Question 6?