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A piece of insulated wire is shaped into a figure 8, as shown in Figure P31.18. The radius of the upper circle is 5.00 cm and that of the lower circle is 9.00 cm. The wire has a uniform resistance per unit length of 14.00 /m. A uniform magnetic field is applied perpendicular to the plane of the two circles, in the direction shown. The magnetic field is increasing at a constant rate of 2.00 T/s. What is the magnitude of the induced current in the wire?
It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, Find the minimum speed of a lead bullet
A very long, straight solenoid with a cross-sectional area of 5.75cm^2 is wound with 36 turns of wire per centimeter, What is the average induced emf in the secondary coil
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. The loop's diameter changes from 20.5 cm t0 5.6 cm in 0.55 s, What is the magnitude of the average induced emf
A battery with \Epslion 12.0 V delivers a termal voltage of 11.2 V to a 45.0 V to a 45.0 \Omega load resistor. Calculate The value of the battery's internal resisance
A satellite is put in a circular orbit about Earth with a radius equal to 45% of the radius of the Moon's orbit. What is its period of revolution in lunar months
Lithium hydride, 7LiH, is a potential fuel for fusion reactors because it is one of the few compounds of very light elements that exists as a solid, and is therefore more dense than gaseous fuels even under extreme conditions
White light, with frequencies ranging from 4.20×1014 Hz to 7.74×1014 Hz, is incident on a calcium surface. Calculate the lowest frequency for which no electrons are ejected
An outside loudspeaker (considered a small source) emits sound waves with a power output of 120 W. Find the intensity level in decibels at that distance
A hand-driven tire pump has a 2.50 cm diameter piston and a maximum stroke of 34.0 cm. What average force do you exert on the piston, neglecting friction and gravity
A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill. The crest of the second hill is circular, What must be the height of the hill
A 95-{rm m}-long train begins uniform acceleration from rest. The front of the train has a speed of 25 {rm m/s} when it passes a railway worker who is standing 120m from where the front of the train started. What would be the speed of last car as ..
The coil of a generator has a radius of 0.16 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. What is the peak emf of this generator
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