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an ac generator has 80 rectangular loops on its armature each loop is 11 cm long and 10 cm wide the armature rotates at
an electric power station is producing 12e3 w of power that is to be sent to a small town located 12 km away each of
two cylinders each contain 030 mol of a diatomic gas at 270 k and a pressure of 30 atm cylinder a expands isothermally
a wire is formed into a circle having a diameter of 103 cm and is placed in a uniform magnetic field of 284 mt the wire
410g of nitrogen gas at 200 c and an initial pressure of 270 atm undergo an isobaric expansion until the volume has
an electron and a positron have masses of 911 10-31 kg they collide and both vanish with only electromagnetic radiation
a conductor bar ab of length 06 m is moving on two conducting rails with a speed v 36 ms perpendicular to a uniform
a proton moving in a circular orbit of radius r 45 cm in a uniform magnetic field of 065 t perpendicular to the orbit
a long solenoid of length of 50 cm and an area 40 cm2 has 320 turns what is its self inductance if the current in the
a uniform magnetic field increases from 10 t to 12 t inb 05 swhat is the rate of change of the magnetic fieldwhat is
a long solenoid of 24 turns per cm carries a current of 16 awhat is the magnitude of the magnetic field in the solenoid
a circular coil of 15 turns and area 40 cm2 carries a current of 12 awhat is the magnetic moment of the coilwhat is the
a battery of internal resistance r 02 and emf e 120 v if the battery is connected to a device of resistance 60 ohms
a 30-cm object is placed 80 cm in front of a mirror the virtual image is 40 cm further from the mirror when the mirror
a 60-ft tall football player stands in front of a plane mirror how tall must the mirror be so that the football player
a dime is placed in front of a concave mirror that has a radius of curvature r 015 m the image of the dime is inverted
a person on a safari wants to take a photograph of a hippopotamus from a distance of 751 m the animal is 435 m long and
a wire of resistance 54 is connected to a battery whose emf is 20 v and whose internal resistance is 10 in 18 min
an electron moving in the positive x-direction passes through a slit of width y 955 nm what is the minimum uncertainty
a converging lens has a focal length of 60cm a 11cm -high arrow is located 11cm from the lens with its lowest point
three capacitors having capacitances of 83mu f 88mu f and 40mu f are connected in series across a 38-rm v potential
the body contains many small currents caused by the motion of ions in the organs and cells measurements of the magnetic
74 mol of helium are in a 16 l cylinder the pressure gauge on the cylinder reads 68 psi what area the temperature of
a sound source emits sounds of frequency 215 hz that travel through still air at 340 ms this sound source moves with a