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Find the current I required to establish a flux F = 2.4 × 10-4 Wb in the magnetic circuit .
The force carried by the plunger of the door chime of Figure is determined.
Determine the required current to establish this flux level if we assume that the total mmf drop is across the air gap.
Find the value of I required to establish a flux in the gap of Fg 2 × 10-4 Wb.
Find the magnetic flux F established in the series magnetic circuit of Fig.
Write the mathematical expressions for the voltage vC and the current iC when the switch is closed.
Find the waveform for the average current if the voltage across a 0.06-µF capacitor is as shown in Figure.
If the switch is moved to position 2 one hour later, find the time required for vR2 to drop to 20 V.
Determine the voltage across each capacitor and the charge on each capacitor.
When the photographer takes a picture, the flash fires for 1/2000 s. What is the average current through the flashtube?
Determine the energy stored by each capacitor under steady-state conditions.
Obtain the power curve (representing the energy stored by the capacitor over the same time interval), and compare it to the plot of Figure B.
Write a QBASIC program to tabulate the voltage vC and current iC for the network of Fig. for five time constants.
Write a program to write the mathematical expression for the voltage vC for the network of Fig.
Determine the voltage vC after one, three, and five time constants.
Write the mathematical expression for the current iC following the closing of the switch.
Determine the mathematical expression for the current following the closing of the switch.
Determine the mathematical expressions for the voltage vC and the current iC if the switch is thrown into position 3 at t = 200 ms.
Find the mathematical expression for the voltage across the capacitor after the switch is thrown into position 1.
Find the mathematical expressions for the voltage vC and the current iC when the switch is closed.
Determine when the discharge current is one-half its maximum value if contact is made at t = 0 s.
Determine the power delivered by the source at the instant t = 2t.
Calculate vC, iC, and vR1 at 0.5 s and 1 s after the switch makes contact with position 1.
Determine the voltmeter reading one time constant after the switch is closed.
Find the time that must pass after the closing of the switch for the voltage across the meter to reach 10 V.