Electro- magnetism questions | form six Physics

A horizontal strainght wire of 0.05m long weighing 2.4gm^-1 is placed perpendicular to a uniform horizontal magnetic field of flux density 0.8T. If the resistance of the wire is 7.6m^-1, calculate the potential difference that has to be applied between the ends of the wire to make it just self-supporting.

Answer / Solution

UNSOLVED

Two very long wires made of copper and equal lengths are placed parallel to each other in such a way that they are 10cm apart. If the total power dissipated in the two wires is 75W, find the force between them if the resistivity of the copper wire is 1.69x10^-8m and a diameter of 2mm.

Answer / Solution

UNSOLVED

Explain the statement that, a sinusoidal current of peak value 5A passed through an a.c ammeter reads .

Answer / Solution

UNSOLVED

A coil which has an inductance of 0.2H and negligible resistance is in series in a resistor whose resistance is 60. The pair is connected across a 50V_emg supply alternating at . Calculate the total impendance of the circuit and its power factor.

Answer / Solution

UNSOLVED

State Lenz`s law of electromagnetic induction.

Answer / Solution

UNSOLVED