Two parallel conductors each of 0.50 m length, separated by 5 x 10-3 m and carrying 3.0 A in opposite directions, will experience what type and magnitude of mutual force? (magnetic permeability in empty space μ0 = 4π x 10-7 T m/A)

The magnetic field inside a 100-turn solenoid .020 m long that carries a 10 A current is

Three resistors, each with resistance R1, are in series in a circuit. They are replaced by one resistor with equivalent resistance R. Comparing this resistor to the first resistor of the previous circuit,

A 12 V potential difference is applied across a series combination of four 6 Ω resistors. The current in each resistor is

The plate area of a parallel-plate capacitor of capacitance C is doubled and the distance between the plates is halved, so that the volume of the dielectric remains the same. The new capacitance of the capacitor is

Ten million electrons are placed on a solid copper sphere. The electrons become

When a 100 W, 240 V light bulb is operated at 200 V, the current that flows in it is

An electric heater draws a current of 20 A when connected to a 120 V power source. Its resistance is

If a 20 μF capacitor is to have an energy content of 2.5 J, it must be placed across a potential difference of

The electric field 2.0 x 10-2 m from a certain charge has a magnitude of 1.0 x 105 N/C. The magnitude of the electric field 1.0 x 10-2 m from the charge is