The voltage and power ratings of a light bulb, which are the normal the the fila
ID: 1485442 • Letter: T
Question
The voltage and power ratings of a light bulb, which are the normal the the filament resistance of the bulb is con constant conations If this light bulb is operated with a current that is 85% of the normal what is the actual power drawn by the bulb? reactance of 80 ohms and an inductance ohm resistor and a capacitor, whose reactance are also in the circuit. The current in the What is the rms voltage across each clement? the impedance of the entire circuit? voltage across the source? the angular frequence as which the circuit is oscillating? What is the capacitance of the capacitor? What is the resonant frequency for this circuit?Explanation / Answer
9) Since the magnetic field through the solenoid due to the bar is to the left, the magnetic field due to the induced current in the loop should be towards the right. So, current flowing through the resistor should be from a to b.
10) Rated power, Pr = Ir2R = 60 W
Actual power, P = (0.85Ir)2R = 0.852 * Pr = 0.852 * 60 = 43.35 W
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