Electrical Engineering Answers

Design a Mod 13 counter.

Design an XNOR gate with two inputs A and B using only NAND gates. Mention the expressions in terms of A & B at the output of each NAND gate in your circuit diagram.

In a communication system, packets are transmitted from a sender to a receiver. Each

packet is received with no error with probability p independently from other packets

(with probability 1−p the packet is lost). The receiver can decode the message as soon as

it receives k packets with no error. Compute the probability that the sender sends exactly

n packets until the receiver can decode the message successfully

A current transformer has a single turn on the primary winding and a secondary winding of 60 turns. The secondary

winding is connected to an ammeter with a resistance of 0.15Ω. The resistance of the secondary winding is 0.25Ω. If

the current in the primary winding is 300 A, determine (a) the reading on the ammeter, (b) the potential difference

across the ammeter and (c) the total load (in VA) on the secondary.

An air-gap between two pole pieces is 20 mm in length and the area of the flux path across the gap is 5 cm2. If the flux required in the air-gap is 0.75 mWb. Find the mmf necessary.

A steel ring has a mean diameter of 15 cm, a cross-section of 20 cm2

and a radial airgap of 0.5

mm cut in it. The ring is uniformly wound with 1500 turns of insulated wire and a magnetizing

current of 1 A produces a flux of 1 mWb in the airgap. Neglecting the effect of magnetic leakage

and fringing, calculate: (a) the reluctance of the magnetic circuit; (b) the relative permeability

of the steel.

calculate the dynamic slope resistance when a voltage of 50V is applied across a germanium diode at 300K when saturation current is 10uA

Two systems have the following equations of state, where RR is the gas constant per mole. The mole numbers are N1​ = 3 and N2​ = 5. The initial temperatures are T1​ = 175 K and T2​ = 400 K. What is the temperature once equilibrium is reached (in Kelvin)?

1/t1=3/2(R*N1/U1)

1/t2=5/2(R*N2/U2)​

1.Asilicon pn-junction at T= 300K is doped at Nd =10^16 and Na=10^17. the junction capacitance is to be cj=0.8pf. when a reverse bias voltage of VR=5v is applied . find the zero-biased junction.