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A switching power converter is designed to have efficiency of 95% when the output load is 100w. The efficiency increases linearly up to 97% with 200w output (I.e efficiency is 96% at 150w and so on ) similarly the efficiency decreases to 94% at 50w output the converter will be damaged whenever the power dissipated inside it exceeds 6w if the converter is intended to operate for output loads between 20w and some maximum limit what is the upper limit of output power which can safely be supplied?
An 7.00 foot extension cord has two 18 measure copper wires, each with a diameter of 1.400 mm. At what rate is energy delivered to the resistance in the cord when it is carrying a current of 1.00 A? W. At what rate is energy delivered to the resistan..
The magnetic force on a straight 0.31 m segment of wire carrying a current of 4.5 A is 1.5 N. What is the magnitude of the component of the magnetic field that is perpendicular to the wire? Answer in units of T.
You are on a cruise ship traveling north at a speed of 13.0 m/s with respect to land. If you walk north toward the front of the ship, with a speed of 2.7 with respect to the ship, what is your velocity with respect to the land
a window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 190 n and is
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with an amplitude of 20.0 cm
A 30-cm bar is made from putting together three 10-cm bars of steel, copper, and aluminium, each having cross-sectional area 4cm2. One end of the steel is in contact with a nice-water mixture. When the system comes into equilibrium,
An electric field of magnitude 210 V/m is directed perpendicular to a circular planar surface with radius 6.37 cm, Determine the magnitude of the magnetic field at a radial distance 14.7 cm away from the center of the circular area
Two organ pipes, open at one end but closed at the other, are each 1.27m long. One is now lengthened by 2.00cm. Find the frequency of the beat they produce when playing together in their fundamental.
What is the electric field strength between the disks. What is the speed of the box at the end of the 5.7-s interval.
A point like charge of +20nC sits at the center of a thick spherical shell of inner radius 4cm and the outer radius 6cm. The shell is made of copper and has a net charge of -10nC. Describe the distribution of charge on the conductor
A rock weighing 10kg is carried horizontally across a 10m room. Calculate What power is expended if you lift the rock to 120cm in time 10s
A clarinetist, setting out for a performance, grabs his 3.19-kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 36.0 N. Find the case\'s vertical acceleration
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