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Two points A and B lie 20 cm apart on a line extending radially from a point charge Q. If the potential at A is 150 V and the potential at B is 120 V, find the charge Q and the distance of point A from the charge. What is the work that needs to be done to move a 10 µC charge from B to A?
A dipole moment is placed in a uniform electric field oriented along an unknown direction. The maximum torque applied to the dipole is equal to 0.1 N.m. When the dipole reaches equilibrium its potential energy is equal to -0.2 J.
During a flare-up from a sunspot, X-rays (electromagnetic waves)are emitted. If the distance between the sun and the earth is 1.50x 1011 m, how long (in minutes) does it take for theX-rays to reach the earth?
An electron and a positron, each moving at3.0×105m/s, collide head on, disappear, Determine the momentum of each photon
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
A rock is thrown horizontally from a tower at point A and hits the ground 3.5 s later at point B. find the magnitude of the initial velocity of the rock
in fair weather over flat ground there may be a downward electric field of 155 nc. a assume that the earth is a
A rectangular loop of wire enter a 2.0 T magnetic field with velocity of 10 m/s, find the direction of the force experience by the wire
electrons can penetrate the nucleus because the nuclear material exerts no forces on them other than electric forces.
Consider a Van de Graaff generator with a 30.0 cm diameter dome operating in dry air. what is the maximum potential energy of the dome
Plane polarized light of intensity is sent through a polarizer rotated 45 degrees clockwise to the original plane of polarizer, What is the incident intensity of original intensity
What diameter has the tip of the second hand with 100mil/hr tangential speed? What diameter has the tip of the minute hand with 100mil/hr tangential?
A refracting telescope has an objective lens of focal length 16.0in and eyepieces of focal lengths 12.0mm, What are the largest and smallest angular magnifications
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