Electric Circuits Answers

Find the ratio of the diameter of aluminium to copper wire, if they have the same
resistance per unit length. Take the resistivity values of aluminium and copper to
be 2.65× 10−8 Ω m and 1.72 × 10−8 Ω m respectively

What current flows through a 2.54- cm diameter rod of pure silicon that is 20.0
cm long, when 1.00× 103 ?

Why transformer coupling is not
preferred at low frequencies?

Why is it necessary in the case of cascade amplifier to use coupling network between the two stages?

Using Maxwell's equation in free space,derive the wave equations for the z-component of electric field vector.

Two resistors of 4Ω and 6Ω are connected in parallel circuit. The total amount of current flowing in the circuit is 30 Ampere. Find the current of each resistor.

Multiply
10001↓2
by
1111↓2

Design and draw a Mod-12 counter. Explain its working.

You are given one IC 7812 and you require +8V regulated voltage. Design and draw
a circuit to obtain the required voltage by using this IC and appropriate resistors.

A high frequency signal source with large output resistance is to be connected to the
input of an op-amp inverting amplifier. Which characteristics of the op-amp will be
significant in handling such signal? Justify your answer.