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Consider a simple transformer that has a 100-turn primary coil and a 1000-turn secndary coil. The primary is connected to a 120-V AC source and the secondary scoil is connected to a light bulb with 1000 ohms of resistance. What is the current through the bulb? What is the power in the bulb? What is the power in the primary coil? What is the current in the primary coil?
In a Hall-effect experiment, a current of 2.9 A sent lengthwise through a conductor 0.89 cm wide, 3.1 cm long,, find the drift speed (in m/s) of the charge carriers
a 150 N sled is pulled up a 28 degree slope at a constant speed by a force of 100 N. What is the coefficient of kinetic friction between sled and slope
A 362 g object is attached to a spring and executes simple harmonic motion with the period of 0.200 s. If the total energy of the system is 6.71 J.
At a certain location, Earth's magnetic field of 53 µT is horizontal and directed due north. find the angle between the current direction and due north
A 1100 kg car carrying four 75 kg people travels over a "washboard" dirt road with corrugations 3.5 m apart. by how much does the car body rise on its suspension
An object has a kinetic energy of 265 J and a momentum of magnitude20.9 kg·m/s. Find the speed and the mass of the object
A brave child decides to grab on to an already spinning merry-go-round. What is the moment of inertia of the merry-go-round with respect to its central axis
It is desired to magnify reading materal by a factor of 2.5xwhen a book is placed 8.0 cm behind a lens. What is the power of the lens in diopters
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in part A. What should be maximum speed of the car so it can round the curve safely?
Consider a camera that moves its lens back and forth to focus on objects near and far. As an object approaches, what direction should the lens move
You are going to change the angle phi2 of applied force on the right side of the Equal Arm Balance keeping the holding force constant and the Balance in equilibrium
An electric field is set up between two parallel plates, each of area 2.2 m2, by putting 1.0 C charge on one plate and the -1.0 C charge on the other. The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates ..
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