Physics Magnetism,Magnetic Effects Of Current Level: High School
Calculate the force on an air which has acquired a net charge of 1550 micro C and moves with a speed of 120 m/s perpendicular to the Earth’s magnetic field of 5.0 x 10^-5 T .
Physics Electrostatics Level: High School
An electron and a proton are 0.53 x 10^-10 m apart .a) What is their dipole moment if they are at rest ?
b) What is the average dipole moment if the electron revolves about the proton in a circular orbit ?
Physics Electrostatics Level: High School
An electron starts from rest 72.5 cm from a fixed point charge with Q = -0.125 micro C . How fast will the electron be moving when it is very far away ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
A 5.0-KeV(kinetic energy) proton enters 0.20T field , in a plane perpendicular to the field .What is the radius of its path ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
For a particle of mass m and charge q moving in a circular path in a magnetic field B ,a) Show that its kinetic energy is proportional to r^2 , the square of the radius of curvature of its path .
b) Show that its angular momentum is L = qBr^2 , about the center of the circle
Physics Magnetism,Magnetic Effects Of Current Level: High School
An electron is projected vertically upward with a speed of 1.80 x 10^6 m/s into a uniform magnetic field of 0.250 T that is directed horizontally away from the observer . Describe the electron’s path in this field .
Physics Magnetism,Magnetic Effects Of Current Level: High School
A straight 2.0mm diameter copper wire can just “float” horizontally in air because of the force of the Earth’s magnetic field B , which is horizontal , perpendicular to the wire , and of magnitude 5.0 x 10^-5 T . What current does the wire carry ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
Calculate the magnetic force on a 240-m length of wire stretched between two towers carrying a 150-A current . The Earth’s magnetic field of 5.0 x 10^-5 T makes an angle of 60 degrees with the wire . How much current is flowing in a wire 4.20 m long if the maximum force on it is 0.900 N when placed in a uniform 0.0800-T field ?
Physics Electrostatics Level: High School
An electron starting from rest acquires 2.0 keV of kinetic energy in moving from point A to point B .a) How much kinetic energy would a proton acquire , starting from rest at B and moving to point A ?
b) Determine the ratio of their speeds at the end of their respective trajectories .
Physics Electrostatics Level: High School
An alpha particle (which is a helium nucleus , Q = +2e , m = 6.64 x 10^-27 kg) is emitted in a radioactive decay with kinetic energy 5.53 MeV . What is its speed ?
Physics Electrostatics Level: High School
What is the speed of(a) a 3.5 keV (kinetic energy) electron
(b) a 3.5 ke V proton ?
Physics Electrostatics Level: High School
How much work must be done to bring three electrons from a great distance apart to within 1.0 x 10^-10 m from one another ?
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on current carrying conductor in a magnetic field
An electron is moving at a speed of 1.0 x 10 4th m/s in a circular path of radius of 2.0 cm inside a solenoid . The magnetic field of the solenoid is perpendicular to the plane of the electron’s path. Finda) The strength of the magnetic field inside the solenoid
b) The current in the solenoid if it has 25 turns per centimeter
Physics Magnetism,Magnetic Effects Of Current Level: High School
Force on current carrying conductor in a magnetic field
A 0.200 kg metal rod carrying a current of 10.0A glides on two horizontal rails 0.500m apart . What vertical magnetic field is required to keep the rod moving at a constant speed if the coefficient of kinetic friction between the rod and rails is 0.100
Physics Electromagnetic Induction Level: High School
A 1200-nF capacitor with circular parallel plates 2.0 cm in diameter is accumulating charge at the rate of 35.0 mC/s at some instant in time .
1) What will be the magnitude of the induced magnetic field 10.0 cm radially outward from the center of the plates ?
2) What will be the magnitude of the field after the capacitor is fully charged ?
