2211

Physics Alternating Current Level: High School

An L-C circuit consists of an inductor with L = 0.800 H and a capacitor with C = 6.00 x 10^-4F . The initial charge on the capacitor is 5.00 micro C , and the initial current in the inductor is zero .

a) What is the maximum voltage across the capacitor ?

b) What is the minimum current in the inductor ?

c) What is the maximum energy stored in the inductor ?

d) When the current in the inductor has half its maximum value , what is the charge on the capacitor and what is the energy stored in the inductor ?




2210

Physics Electromagnetic Induction Level: High School

Uniform electric and magnetic fields E and B occupy the same region of free space . If E = 600 V.m^-1 , what is B if the energy densities in the electric and magnetic fields are equal ?



2209

Physics Electromagnetic Induction Level: High School

The current in a coil of wire is initially zero but increases at a constant rate -+; after 10.0 s it is 50.0 A . The changing current induces an emf of 45.0 V in the coil .

a) Determine the self-induced of the coil .

b) Determine the total magnetic flux through the coil when the current is 50.0 A .

c) If the resistance of the coil is 25.0 ohm , determine the ratio of the rate at which energy is being stored in the magnetic field to the rate at which electrical energy is being converted to heat by the resistance at the instant when the current is 50.0 A




2208

Physics Electromagnetic Induction Level: High School

A search coil is used to measure magnetic fields is to be made with a radius of 2.00 cm . It is to be designed so that flipping it 180 degrees in a field of 0.100 T causes a total charge of 4.00 x 10^-4 C to flow in a charge-measuring instrument when the total circuit resistance is 50.0 ohm . How many turns should the coil have ?



2207

Physics Electromagnetic Induction Level: High School

A slender rod 0.760 m long rotates about an axis through one rod with an angular velocity of 12.0 rad.s-1 . The plane of rotation of the rod is perpendicular to a uniform magnetic field with a magnitude of 0.500 T .

a) What is the induced emf in the rod ?

b) What is the potential difference between its ends ?




2206

Physics Magnetism,Magnetic Effects Of Current Level: High School

The current in the windings on a toroid is 2.00 A. There are 400 turns , and the mean radius is 0.0640 m . The magnetic field inside the windings is 1.40 T .calculate ,

a) The relative permeability .

b) The magnetic susceptibility of the material that fills the toroid .




2205

Physics Magnetism,Magnetic Effects Of Current Level: High School

A long, straight wire carries a current of 8.00 A directed along the y-axis and the –y direction . In addition to the magnetic field due to the current tin the wire , a uniform magnetic field Bo with magnitude 8.00 x 10^-7 T is directed parallel to the x-axis . Determine the resultant magnetic field (magnitude and direction) at the following points .

a) x = 0, z = 2.00 m

b) x = 2.00 m , z = 0

c) x = 0, z = -2.00 m




2204

Physics Magnetism,Magnetic Effects Of Current Level: High School

A long straight wire carries a current of 1.50 A . An electron travels with a speed of 5.00 x 104 m.s-1 parallel to the wire , 0.600 m from it , and in the same direction as the current . What are the magnitude and direction of the force that the magnetic field of the current exerts on the moving electron ?



2203

Physics Magnetism,Magnetic Effects Of Current Level: High School

A wire 0.200 m long lies along the y-axis and carries a current of 10.0A in the +y direction . The magnetic field is uniform and has components Bx = 0.300 T , By = -1.20 T, and Bz = 0.500T .

a) Find the components of force on the wire . (The resultant force is the vector sum of the forces due to each component of B .)

b) What is the magnitude of the total force on the wire ?




2202

Physics Magnetism,Magnetic Effects Of Current Level: High School

A particle having a charge q = 2.00 x 10-6C is traveling with a velocity = 1.50 x 103 m.s-1 in the +y direction. The particle experiences a force F due to Fx = 6.00 x 10^-4N, Fy = 0, and Fz = -8.00 x 10^-4N .

a) Determine F , the magnitude of F .

b) Determine Bx, By , and Bz , or at least as many of the three components as possible from the information give .

c) If it is a given in addition that the magnitude of the magnetic field is 0.500 T , determine the remaining components of B .




2201

Physics Magnetism,Magnetic Effects Of Current Level: High School

The force on a charged particle moving in a magnetic field can be computed as the vector sum of the forces due to each separate component of the magnetic field . A particle with a charge of 3.50 x 10^-8C has a velocity of v = 8.00 x 105 m.s-1 in the –x direction . It is moving in a uniform magnetic field with components Bx = +0.200 T , By = -0.500T , and Bz = +0.300 T . What are the components of the force exerted on the particle by the magnetic field .



2200

Physics Magnetism,Magnetic Effects Of Current Level: High School

A particle with initial velocity 6.00 x 103 m.s-1 in the + x-direction enters a region of uniform electric fields . The magnetic field in the region is B = 0.300 T in the –y direction . Calculate the magnitude and direction of the electric field in the region if the particle passes through undeflected for a particle charge .

a) +0.400 x 10^-8C

b) -0.400 x 10^-8C




2199

Physics Magnetism,Magnetic Effects Of Current Level: High School

Magnetic field due to a current carrying conductor

The two wire shown in the figure at ‘click here’ carry currents of 5.00 A in opposite directions and are separated by 10.0 cm . Find the direction and magnitude of the net magnetic field ,

a) at a point midway between the wires

b) at point P1, 10.0 cm to the right of the wires on the right

c) at point P2,20.0 cm to the left of the wires on the left .




2198

Physics Magnetism,Magnetic Effects Of Current Level: High School

A mass spectrometer is used to examine the isotopes of uranium. Ions in the beam emerge from the velocity selector at a speed of 3.00 x 10^5 m/s and enter a uniform magnetic field of 0.600 T directed perpendicularly to the velocity of the ions . What is the distance between the impact points formed on the photographic plate by singly charged ions of 235 U and 238 U ?



2197

Physics Magnetism,Magnetic Effects Of Current Level: High School

An electron enters a region in which there’s a magnetic field B = 0.1T pointing along the positive Z-axis , and electric field E = 3.5 N/C pointing along the positive Y-axis . If we want the electron to continue traveling in a straight line without changing speed , what should its velocity (magnitude and direction ) be ?

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