Electricity and Magnetism Answers

in the lab frame,is the current carried by ions or by electrons or by both?give reason?

Two long parallel wires are 10 cm apart and carry currents of 6 A and 4 A. what is the field B at 4 A carrying wire due to 6 A wire.

An ion engine has a 1T magnetic field and hydrogen plasma is to be short out at an E×B velocity of 1150km/s. how much internal electric field must be present in the plasma?

An ion engine has a 1T magnetic field and hydrogen plasma is to be short out at an E×B velocity of 1150km/s. how much internal electric field must be present in the plasma?

The plates of a parallel plate capacitor,5.0x10^-3m apart are maintained at a potential difference of 5.0x10^4 Calculate the magnitude of the I. Electric field intensity between the plates II. Force on the electron.

A hydrogen atom be made up of a single proton and a single electron.the proton has a charge of+e and electron has +e.in the ground state of the atom the electron orbits the proton at most probable distance of 5.39*10^-11m determine the electric force on the electron due to the proton

A long straight wire carries a current of 1.5 A. an electron travels with a speed of 5 x 106 cm/s parallel to the wire 10 cm from it and in the same direction as the current. What force does the magnetic field of the current exert on the moving electron.

An ideal transformer is supplied with voltage 240 V. It is found that the potential difference of the secondary coil is 12 V and the current is 3 A. Find the current in the primary coil.

The efficiency of a transformer is 90%. The input voltage is 20 V and produced 100 W of the output power. What is the currents in the primary coil?

Calculate the mass of a de Broglie’s particle traveling at a speed of 30m/s

with wavelength 1.49x10-26 nm:

A 0.43 x 10-3 kg.

B 0.15 kg.

C 0.35 x 10-3 kg.

D 0.96 kg.