Electric Circuits Answers

With the help of circuit diagram explain how regenerative feedback is provided in Hartley oscillator?

The current density in a copper wire of diameter 1.02 mm is 1.75x10 to the power of 5 A/m². The number of free electrons per cubic meter of copper is 8.5x10 to the power of 28. Find the current in the wire and magnitude of drift velocity of electrons in the wire.

The RC circuit below includes a 12 V battery, a 60Ω resistor and a 10 mF capacitor. (a) Show the complete calculation of the initial charge current in the circuit. (b) Show the complete calculation of the time constant for charging the capacitor. (b) Show the complete calculation of the charge current after 6.0 s. (c) Show the complete calculation of the final charge on the capacitor.

For the circuit below (a) Define the currents in each part of the circuit (b) Write the equation for Kirchhoff’s junction rule. (c) Write Kirchhoff’s equation for the left circuit loop (d) Write Kirchhoff’s equation for the right circuit loop. (e) Show the complete solution to the three equations for the currents in the various parts of the circuit. 4Ω, 18 V, 6 V, 6 Ω, 8Ω.

1. For the circuit below: (a) Show the complete calculation of the equivalent resistance for the four resistors. (b) Show the complete calculation of the current from the battery. (c) Show the complete calculation of the power dissipated in the 36 Ω resistor. 252 V, 25 Ω, 35 Ω; 36 Ω and 18 Ω in parallel.

The resistance of ammeter is vary high as compared to voltmeter true ,false

An electrical space heater contains a Nichrome heating element that has a resistance
of 8.00 Ω at 20.0 C. When 120 V are applied across the heating element, the electric
current heats the Nichrome wire to 1000C.
a) Show the complete calculation of the heating element resistance at 1000 C.
b) Show the complete calculation of the heating element current at 1000 C.
c) Show the complete calculation of the heating element operating power at 1000 C.

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.