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Electrical Engineering
Underline the significance of carrier concentration of Base in the operation of a BJT.
Electrical Engineering
Show that the voltage gain of Emitter Follower is less than unity.
Electrical Engineering
Drive a formula of instantaneous power for single-phase AC power system in the following different loads. i. Pure resistive load ii. Pure inductive load iii. Pure capacitive load iv. RLC load
Electrical Engineering
Three point charges +Q1, -Q2, and +Q3 are equally spaced along a line. If the magnitude of Q1, and Q2 are equal, what must be the magnitude of Q3 in order that the net force on Q1 be zero.
Electrical Engineering
Consider a coaxial cable formed by two concentric cylindrical conductors with the radius of the inner conductor being “a” and the outer conductor being “b”. Let L be the length of the cable. Assume the surface charge distribution on the inner conductor be defined by ρs. Determine the flux density D at a point ρ located radially between a and b, i.e. a < ρ < b.
Electrical Engineering
The unity feedback system with loop transfer function is given as Gc(s)G(s)=50/s(s+40).Determine the bandwidth of closed loop transfer function.
Electrical Engineering
Minimize the following Boolean expression using Boolean identities
F(A,B,C,D,E) = A’B’C’D’+A’BC’D’+A’B’CD’+A’B’D’E+AB’CD+ABD’E’+ABD’E+AB’CDE
F(A,B,C,D,E) = A’B’C’D’+A’BC’D’+A’B’CD’+A’B’D’E+AB’CD+ABD’E’+ABD’E+AB’CDE
Electrical Engineering
30mva 13.8kv 3-phase alternator has subtransient of 15% and negative and zero sequence reactances of 15% and 5%. The alternator supplies two motors over a transmission line having transformers.Motors rated inputs 20mva & 10mva both at 12.5kv with 20% subtransient reactances and negative & zero sequence reactances are 20% & 5% respectively. Current limiting reactors of 2ohm each in neutral of alternator of large motor.3 phase transformers are rated 35mva 21/132 kV delta/star with leakage reactance of 10%, series reactance of the line is 100ohm & zero sequence reactance of the line is 175 ohms. Use a base of 30mva and 22kv and determine the fault current when an L-L-G fault occurs at point P. Assume a prefault voltage of 138 kv
Electrical Engineering
The rod OA in Fig . 12-33a rotates in the horizontal plane such that A = ( trad . At the same time , the collar B is sliding outward along OA so that r = ( 100+ ) mm . If in both cases / is in seconds , determine the velocity and acceleration of the collar when I = I s .
Electrical Engineering
A latched-on SCR will stop conducting in which of the following conditions?
a. A gate voltage reduced to zero.
b. A gate receives negative trigger pulse.
c. The cathode becomes more positive than the anode.
d. The anode becomes more positive than the gate.
a. A gate voltage reduced to zero.
b. A gate receives negative trigger pulse.
c. The cathode becomes more positive than the anode.
d. The anode becomes more positive than the gate.
