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An ideal step-downtransformer has a primary coil of 380 turns and a secondary coil of20 turns. Its primary coil is plugged into an outlet with 115V(AC), from which it draws an rms current of 0.71 A.
a-What is the voltage in the secondary coil?b-Calculate the rms current in the secondarycoil.c-Assuming that the transformer secondary isdriving a resistive load, calculate the average power dissipated inthe resistor.
An electron is confined to a one-dimensional region in which its zero-point (n = 1) energy is 2.90 eV. What is the length of the region
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
A double slit is opposite the center of a 1.7-m wide screen 1.9 m from the slits. How many fringes are visible on the screen if the slit is illuminated by 648-nm light
A student is asked to determine thickness of film of oil (n=1.43) on surface of water n=1.33) Light travels through air to oil film to water. Calculate minimum possible thickness of oil film
a bomber on a bomb run is traveling at a horizontal velocity of 152 meters per second and flying at an altitude of 1500
A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 950 N/m. find the speed of the bullet just before it hits the block
A coil has 480 turns and self-inductance 3.40 mH. At t = 0.0150 s, what is the magnitude of the induced emf
Iron atoms have been detected in the sun's atmosphere, some withmany of their electrons stripped away. What is the net electriccharge (in coulombs) of an iron atom with 26 protons and 10electrons?
Calculate the mass of a solid gold rectangular bar that has dimensions lwh = 4.20 cm 12.0 cm 29.0 cm. (The density of gold is 19.3 103 kg/m3.
Consider an electron in a cyclotron motion with the velocity v = 10.000 × 105 m/s perpendicular to the magnetic field of strength B = 1.00 × 10-4 T. Find the ratio of the field created during the cyclotron motion to the external field.
calculate the ratio of the drag force on a jet flying at 800 kmh at an altitude of 8.0 km to the drag force on a
A simple pendulum is constructed from a mass of 2 kg and a massless string of length 3.5 m. What is the period of the pendulum
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