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A transformer has 500 turns on its primary and 200 turns on its secondary.
(a) Is this a step-up or a step-down transformer?
(b) If a voltage of 100 V is applied to the primary and a current of 0.25 A flows in these windings, what are the voltage output of the secondary and the current in the secondary?
The 700-lb flywheel of a small hoisting engine has a radius of gyration of 24 in. If the power is cut off when the angular velocity of the flywheel is 100 rpm clockwise, determine the time required for the system to come torest.
you want to plug in a light bulb p100w an electric heater 1500 w your laptop 65w and a hair dryer 1200 w into the same
a 1kg mass hangs from a cord wrapped around a solid disk pulley with a mass of 3kg and radius 25cm. the cord is 2m long
A 7 kg ball has a velocity of 16 m/s. How much work would be required to stop the ball
A long, straight wire carries a current of 220 mA. Evaluate what is the magnitude of the magnetic field 0.018 centimeter from the wire
A wire 2.05 m long carries a current of 17.0 Aand makes an angle of 50° with a uniform magnetic field B =1.10 T. Calculate the magnitude of the magnetic force on the wire
q1. for the beam given in the figure below assume that the material is astm-a514 steel with elastic modulus and e
a 1100kg auto is at rest at a traffic signal. At theinstant the light turns green, how far is the com of the auto-truck system from the traffic light at t=1.6s
A (perfect) transformer has 20 V and 2 A in its primary coil, 200 turns in its primary circuit, and 20 in its second. How much power is in the secondary circuit
A rectangular coil of 58 turns, dimensions 0.100 m by 0.200 m, and total resistance 10.0 ? rotates with angular speed 35.0 rad/s, Calculate the maximum induced emf in the coil
A 120-V motor has mechanical power output of2.10hp. It is84.0%efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A 1,699-kg satellite orbits the Earth in a circular orbit with a period of 6,016 s. How high above the Earth's surface is the satellite's orbit
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