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Referring to the network of Fig., is Va = 8.8 V the correct reading for the given configuration?
If the voltage Va is 6 V rather than 1 V, try to explain what is wrong about the network construction.
measured by a VOM with an internal resistance of 200 kO as R2 varies from 10 kO to 200 kO in increments of 10 kO.
Which elements are in parallel? Which elements are in series?
Write a program to tabulate the current and power to the resistor RL of the network of Fig. for a range of values for RL from 1 O to 20 O.
If the resistors are available with wattage ratings of 1/2, 1, 2, and 50 W, what is the minimum wattage rating for each resistor?
Find the power dissipated by each resistor, and note whether the power delivered is equal to the power dissipated.
If one bulb burns out (that is, the filament opens), what is the effect on the remaining bulbs?
Determine the power supplied by the 120-V source. How does it compare to the total power of the load.
For the network of Fig. Calculate the power dissipated by the 4-O resistor.
For the network of Fig. Find the current I. Determine the voltage V.
If the current I is reduced to 10 µA, what are the new values of R1, R2, and R3? How do they compare to the results of part (a)?
Find the internal resistance of a battery that has a no-load output voltage of 6 V.
Find the internal resistance of a battery that has a no-load output voltage of 60 V and that supplies a current of 2 A to a load of 28 O.
Determine the current I and its direction for each network of Figure.
Find the unknown voltage source and resistor for the networks of Figure.
Determine the unknown voltages using Kirchhoff's voltage law.
If the resistors are available with wattage ratings of 1/2, 1, and 2 W, what minimum wattage rating can be used for each resistor in this circuit?
If the set is connected to a 120-V source, what is the current through the bulbs if each bulb has an internal resistance of 28 1/ 8 O ?
Find the unknown resistance using the voltage divider rule and the information provided for the circuits of Figure.
Design a voltage divider circuit that will permit the use of an 8-V, 50-mA bulb in an automobile with a 12-V electrical system.
A stereo system draws 2.4 A at 120 V. The audio output power is 50 W. How much power is lost in the form of heat in the system?
If an electric motor having an efficiency of 87% and operating off a 220-V line delivers 3.6 hp.
If it runs on 110 V and is 90% efficient, how many watts does it draw from the power line?