A series RLC circuit attached to a 120 V/60 Hz power line draws 3.00 A of current with a power factor of 0.890. What is the value of the resistor?
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For a science project, you would like to horizontally suspen…
For a science project, you would like to horizontally suspend an 8.5 by 11 inch sheet of black paper in a vertical beam of light whose dimensions exactly match the paper. If the mass of the sheet is 1.2 g, what light intensity will you need? (1 in = 2.54 cm)
a) What current is needed to generate the magnetic field str…
a) What current is needed to generate the magnetic field strength of 10 T at a point 1.4 cm from a long, straight wire? (
LC circuits: A charged capacitor is connected to an ideal in…
LC circuits: A charged capacitor is connected to an ideal inductor. At time t = 0, the charge on the capacitor is equal to 6.00 μC. At time t = 2.00 ms the charge on the capacitor is zero for the first time. What is the amplitude of the current at that same instant?
The figure shows a 15-cm-diameter loop in three different ma…
The figure shows a 15-cm-diameter loop in three different magnetic fields. The loop’s resistance is 0.18
Capacitors in combination: The capacitors in the network sho…
Capacitors in combination: The capacitors in the network shown in the figure all have a capacitance of 5.0 µF. What is the equivalent capacitance, Cab, of this capacitor network?
Drift velocity: The diameter of a 12-gauge copper wire is 0….
Drift velocity: The diameter of a 12-gauge copper wire is 0.081 in. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electrons? The number of electron carriers in 1.0 cm3 of copper is 8.5 × 1022 and e = 1.60 × 10-19 C.
The on-axis magnetic field strength 10 cm from a small bar m…
The on-axis magnetic field strength 10 cm from a small bar magnet is 600
A small bar magnet experiences a 2.30×10−2 N
A small bar magnet experiences a 2.30×10−2 N
AC generator: Wire is wound on a square frame, 30 cm by 30 c…
AC generator: Wire is wound on a square frame, 30 cm by 30 cm, to form a coil of 7 turns. The frame is mounted on a horizontal shaft through its center (perpendicular to the plane of the diagram), as shown in the figure. The coil is in clockwise rotation, with a period of 0.060 s. A uniform, horizontal, magnetic field of magnitude 0.40 T is present. At a given instant, the plane of the coil forms a 60° angle with the horizontal, as shown. At that instant, what is the magnitude of the emf induced in the coil?