A 7.5 cm long gold wire has a 0.10 mm cross section diameter. Opposite ends of this
wire are connected to the terminals of a 1.5 V battery.
a) Show the complete calculation of the resistance of the wire.
b) Show the complete calculation of current through the wire.
c) Show the complete calculation of the power supplied by the battery.

. Every minute, 5 x 10^19 electrons pass a particular cross section of wire.
a} Show the complete calculation of the amount of charge moving through the wire in
a minute
b) Show your complete calculation of the electric current in the wire.

State two causes of energy loss in a transformer.

At what rate must the potential difference between the plates of a parallel-plate capacitor with a 2.0uF capacitance velocity changed to produce a displacement current of 1.5A

A moving coil instruments gives a full scale deflection with a potential difference of 70mV and a current of 20mA calculate the value of the shunt required to give a range of 0-50Amps.

A moving coil instrument gives a full scale deflection (F.S.D) with a current of 30mA (0.030A) and a voltage of 90mv(0.090v). Calculate the value of a resistor to be connected in series with the instruments so that it can be used to read 0-100voltsr

A moving coil instrument gives a full scale deflection (F.S.D) with a current of 30mA (0.030A) and a voltage of 90mv(0.090v). Calculate the value of a resistor to be connected in series with the instruments so that it can be used to read 0-100voltsr
2)__ A moving coil instruments gives a full scale deflection with a potential difference of 70mV and a current of 20mA calculate the value of the shunt required to give a range of 0-50Amps.

Given the input current 15A and the output voltage of 100V for a step-up transformer
having 90% efficiency, find the output power and the voltage in the secondary if the
output current is 3 A.

A rod of resistive material of length L is connected to a battery with potential difference 12 V. The resistance per unit length of the rod varies as ρ(x)=12x ohm/m where x is the distance from one end of the rod.If the current in the resistive rod transfer energy to thermal energy at the rate of 600W then the length of rod will be
Ans 20cm

define ohms law in terms of sigma and E( elctric field )?