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A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). The transformer is to deliver 2000 kW to the factory at 95% efficiency. Find values for the the power
The flux in a transformer changes at a rate of 0.4 Wb/s. The primary coil has 40 turns and the secondary coil has 500 turns
Determine the equation for velocity of the particle as a function of time. Create a graph of velocity vs. time for the particle, for the time interval 0 <= t <= 5s
A 14.8cm diameter loop of wire is initially oriented perpendicular to a 1.3T magnetic field, What is the average induced emf in the loop
The plates of a parallel-plate capacitor are 3.50mmapart, and each carries a charge of magnitude 75.0nC, What is the area of each plate
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and
For your final exam in electronics, you're asked to build an LC circuit that oscillates at 15kHz, What values of inductance and capacitance must you use
Some cell walls in the human body have a layer of negative charge on the inside surface and a layer of positive charge of equal magnitude on the outside surface, Estimate the total electric-field en
A cylindrical air capacitor with a length of 15.6m stores an amount of energy equal to 3.30×10?9J, Calculate the ratio of the radii of the inner and outer conductors
Suppose you throw a rock from an initial height h0 at a speed v0 and angle ? from the horizontal. Neglect drag or friction, Determine the coordinate system and draw a diagram of the trajectory. Draw
a 2.0 nc charge is placed on the x-axis at x=-3.0cm another 2.0nc charge is placed on the x-axis at x=3.0cm, What is the potential at the origin
a skier of mass 100 kg, starts from rest as the top of a frictionless incline of height 20 m, how far does she travel on the horizontal surface before coming to rest
A solid sphere of mass 2.5 kg and a radius 0.15m starts from rest at the top of the a ramp inclined 15 degrees, What is the total kinetic energy of the sphere when it reaches the bottom of the ramp
If the capacitor and unductor in part (a) are connected in an L-C circuit, what will be the resonance angular frequency of that circuit
Calculate the moment of inertia and the rotational kinetic energy for the following objects spinning about a central axis
A 65ohms resistor, an 8.0uF capacitor, and a 35 mH inductor are connected in a series in an ac circuit. Calculate the impedance for a source frequency of 300Hz
A 1940-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 32.2 m/s. At what angle is the hill inclined above the
A 2.20-uF capacitor is connected across an ac source whose voltage amplitude is kept constant at 60.0V but whose frequency can be varied, Find the current amplitude when the angular frequency is 100
A near-sighted woman cannot focus on any object farther away than a distance x = 57 cm. Find the focal length of the lens which will correct her vision
A 240 kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.20, Calculate the power dissipated by 100 of them.
What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 16.5 V while a current of 7.50 A is charging it
A light source moves toward a receiver with speed v. If the source emits light with a frequency f0, what is the frequency of the received signal for a source of 220nm
A 7.00g coin is placed 17.0cm from the center of a turntable. What is the maximum angular velocity with which the turntable can spin without the coin sliding
Find the power delivered by the good battery, and discuss where this power goes, assuming that the emf's and resistances of each battery remain the same throughout the process
A length of wire has a total resistance of 120 ?. If cut up into N identical pieces, How many pieces did the original wire get cut up into