Electrical Engineering Answers

In which of the following situations would a PNP transistor turn on and conduct normally?

a. Emitter= 0 volts Base= 1 volts Collector= 5volts
b. E= 0 volts B= -1 volts C= -5volts
c. E= 5volts B= 6volts C= -1 volts
d. E= 5volts B= 5volts C= -5volts

Each arm of a VOR bi-pole antenna should be the approximately what length?

a. 0.62mtr
b. 1.25mtr
c. 0.83mtr
d. 0.3mtr

What's the approximate range of the outer marker compass locator?

a. 7 kms
b. 15 kms
c. 1 km
d. 24 kms

a) Write a comparative study between substitution impurity, screw
dislocation and grain boundaries. Explain why and how they are
created, how they affect the material properties, and if they can be
controlled and put into use.
b) Derive the effect of temperature on resistivity due to thermal
vibration of atoms

Calculate the value of resistor RX such that the total power dissipated in the circuit is 2.5kw

Classify the following signal as energy signal or power signal. Find the
normalized energy or normalized power.
(i) sin 2t + 3 cos 4t

Determine whether the following signals are periodic or non periodic if the signal is periodic find the fundamental period of
1. x (t) = 6cos 5/4 t + 2 cos 9/7 t
2. x (t) = sin√3t +cos √3t

Classify the following signal as energy signal or power signal . Find the normalized energy or normalized power (a) sin 2t + 3 cos 4t.