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A resistance is connected to a AC source with an rms output of 12 V and a frequency of 60 Hz, the rms current is found to be 2.4 A. When a capacitor is connected in series in this circuit the current drops to 1.4 A. What are the following?
(a) The value of the resistance
(b) The impedance of the circuit at 60 Hz with the capacitor
(c) The capacitance of the capacitor.
There are two identical small metal spheres with charges +charge and -charge and the distance b/w them is r meters. The spheres are placed in contact then set at their original distance.
A jet lands comes in for a landing on an aircraft carrier with an initial landing speed of 152 mi/h. What is the acceleration (assumed constant) if it stops in 2.2 s due to an arresting cable that snags the jet and brings it to a stop
An ac voltmeter, which displays the rms voltage between the two points touched by its leads, is used to measure voltages in the circuit shown in the figure . In this circuit, the ac generator has an rms voltage of 7.10V and a frequency of 30.0kHz ..
Two forces act on a 3.4 kg box. One of the forces is known to be F= 5.5 N. The acceleration is measured to be A= (-1.9i - 2.7j ) m/s2. Find the second force as a magnitude and direction
A bucket of water of mass 15.3kg is suspended by a rope wrapped around a windlass, that is a solid cylinder with diameter 0.330m with mass 12.5kg . The cylinder pivots on a frictionless axle through its center.
An emf of 22.0 mV is induced in a 497 turn coil when the current is changing at a rate of 9.0 A/s. What is the magnetic flux through each turn of the coil
A 1.0-cm-diameter microscope objective has a focal length of 2.8 mm . It is used in visible light with a wavelength of 550 nm. What is the objective's resolving power if used in air
How much momentum does the truck have just before hitting the tree? What is the average force applied by the tree? What is the total momentum of the two billion people?
Use the following values for mass and charge: an electron has mass me = 9.11x10-31 kg and charge -e, a proton has mass mp = 1.67x10-27 kg, What is the kinetic energy of the electron
Two loudspeakers in a plane, 5 m apart, are playing the same frequency. If you stand 14 m in front of the plane of the speakers, What is the frequency of the sound
A 1.92-nF parallel-plate capacitor is charged to an initial potential difference Vi = 100 V and is then isolated. How much work is required to withdraw the mica sheet
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106. One pulse is delivered every time the fully charged capacitor loses 60.5% of its ..
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