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Q. A step-up transformer has 260 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to which the primary circuit is attached is 65.0 V. A. What is the EMF in the secondary circuit? B. The current in the secondary circuit is 0.50 A. What current is in the primary circuit?
Q. A proton moves at a speed of 8.0 103 m/s as it passes through a magnetic field of 0.55 T. Find the radius of the circular path. Note that the charge carried by the proton is equal to that of the electron, but is positive.
A helicopter is ascending vertically with a speed of 9 m/s. At a height of 200 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach ground.
When a potential difference of 140 V is applied to the plates of a parallel-plate capacitor, plates carry a surface charge density of 27 nC/cm2. What is the spacing between the plates.
As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..
At what angle have to the laser beam in the diagram be aimed at mirrored ceiling in order to hit the midpoint of the far wall? The length of the room is a=4.9 m and its height is b=3.00 m.
A chair of weight 130 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 45.0 fixed at an angle of 39.0below the horizontal and the chair slides along the floor.
At 500°C, the diffusion coefficient of Zn in brass is 4.10-17 m2.s-1. What is the flux of Zn moving down the rod.
A 1200kg car rounds a curve of radius 65 m banked at an angle of 14degrees. if the car is traveling at 30km/hr, will a friction force be required? if so, how much and in what direction.
If the far end of the iron rod is in an ice bath at 0°C, find the rate of heat transfer passing from the boiling water to the ice bath. Suppose there is no heat loss to the surrounding air.
Conclude the magnitude and directional angle
What is the main possible displacement of the shopper
Establish steady-state electric field inside Nichrome wire
An airplane with a mass of 2.6*10^6 kg. has the air flow past the lower surface of the wings at 100 m/s. If the wings have a surface area of 1200 m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the ai..
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