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One hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0.100 m2. The circuit is completed by connecting the coil to a 10-ohms resistor. As the magnetic field along the coil axis changes from 1.00 T to 4.5 Tin 3milliseconds, calculate
(a) The induced emf in the coil
(b) The induced current through the resistor.
A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off the surface. What is the minimum thickness t of the oil slick at that spot
A student throws a set of keys 4.4m up to friend in window. the friend catches the keys 1.7s later. what is the intial velocity
Randomly polarized light of intensity I0 is passed through two polarizers whose transmission axes differ by 45 degrees. What is the intensity of the light
When at rest, a proton experiences a net electromagnetic force that has a magnitude of 7.2 × 10-14 N and points in the positive x-direction. Find the magnitude and direction of the electric field
a hydrogen atom is in the n= 2 state. what's the wavelength of a photon with this energy
Lasers are used extensively in eye surgery to remove unwanted "material" from the eye or reshape the eye's lens. What is the power during one of these pulses
A 0.10 m long solenoid has a radius of 0.05 m and 15000 turns. The current in the solenoid changes at a rate of 6.0 A/s. Determine the self-induced emf in the solenoid
A 5.0-kg object is pulled along a horizontal surface at by a 15 N force acting 20? above the horizontal. How much work is done by the gravitational force
Does papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the AV valve flaps.
Two horses pull a large crate of negligible mass at constant speed across a barn floor by means of two light steel cables. What is the work done by each horse if the box is moved a distance of 29 m
A neon sign utilizes a step-up transformer to run at 6000 V on the 120 V from the wall outlet. how many turns does the secondary coil have
A 277.4-N force is applied parallel to a 23.8-degree incline to pull a 29.5-kg crate from rest up the incline to a final height of 5.8 meters. Determine the speed of the crate at the top of the incline
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