Question { 30382 }

Can any one say what is the exact meaning of Engineering.

Answer

The application of scientific and mathematical principles
to practical ends such as the design, manufacture, and
operation of efficient and economical structures, machines,
processes, and system.

Question { Siemens, 6563 }

what is fixed bias with and without decoupling capacitor?

Answer

with ta decoupling capacitor u cannt get o/p bcz it blocks
the DC and allows only AC .... is u dont us it it give the
o/p but it's DC only so no use to hav a DC voltage in O/P

Question { Samsung, 87470 }

what is race around condition

Answer

in jk flip flop race around problem will accur when both
the inputs are high.
it can be prevented by using
master slave jk flip flop.

Question { 16940 }

the coefficient of coupling between two air core coils
depends on ?

Answer

Mutual induction only.

Question { HAL, 19163 }

Why Trasformers rated in KVA

Answer

kVA is the unit for apparent power. Apparent power consists
of active and reactive power. Active power is the share of
the apparent power which transmits energy from the source
(generator) to the user. Reactive power is the share of the
apparent power which represents a useless oscillation of
energy from the source to the user and back again.

It occurs when on account of some inertia in the system
there is a phase shift between voltage and current. This
means that the current does not change polarity synchronous
with the voltage. But the heat generated in a winding as
well as the eddy current losses generated in a transformer
core depend on the current only regardless of whether it
aligns with the voltage or not.

Therefore the heat is always proportional to the square of
the current amplitude irrespective of the phase angle (the
shift between voltage and current). So a transformer has to
be rated in KVA.

Question { ABC, 4477 }

What the diffrence between
distortion,interferance,noise&error

Answer

Interference is caused when two or more signals interfere
with each other.

the effect of the interference is known as noise.

distortion are fundamental signal affected due to
external disturbance.

‘error' is a deviation from accuracy or correctness.
A ‘mistake' is an error caused by a fault: the fault being
misjudgment, carelessness, or forgetfulness.

Question { 7107 }

Why 8051 is called as 8051
plz send ans at swatimehta5487@gmail.com

Answer

because they can all be programmed using 8051 assembly
language, and they all share certain features of z80.

Question { 12732 }

What is the value of binary no 101101 in octal no.?

Answer

55

Question { 7500 }

we callculat main steam flow by D.P. but where is H.P. &
L.P. IN Orfics?

Answer

Fareed also right

Question { CTS, 6564 }

What is coaxial cable?

Answer

Coaxial cable, or coax, is an electrical cable with an
inner conductor surrounded by a flexible, tubular
insulating layer, surrounded by a tubular conducting shield.

Question { CTS, 6426 }

Write a program using micrprocessor?

Answer

program to divide two number using 8085 microprocessor

LDA 9000H
MOV B,A
LDA 9001H
MOV E,A
MVI C,00H
MOV A,B
LOOP : INR C
SUB E
JNZ LOOP
ADD E
DCR C
STA 9002H
MOV E,A
STA 9003H


Input the 2 numbers in 9000 & 9001.

Remainder stored in 9002, Quotient stored in 9003

Question { Infosys, 3938 }

We all know about DC concept,i.e +ve connected to +ve ,-ve
connected to -ve.
If landline phones lines are dc lines,then how it works even
if the polarties are interchanged??

Answer

it work normally

Question { 6468 }

What Is RF?

Answer

Radio frequency (RF) is a rate of oscillation in the range
of about 30 kHz to 300 GHz, which corresponds to the
frequency of electrical signals normally used to produce
and detect radio waves. RF usually refers to electrical
rather than mechanical oscillations, although mechanical RF
systems do exist

Question { Bhel, 13119 }

what is electronics?

Answer

the branch of physics that deals with the emission and
effects of electrons and with the use of electronic devices

Question { 14270 }

why Transformers power mentioned in KVA?. and why Generators
and Motors power mentioned in KW?.

Answer

Transformer and genrator PF depends on the nature of
connected load ( Motor ), But motor has its own fixed Power
factor

Therefore Transformer and genrator capacity shown in KVA (
Without PF ) and motor Capacity shows in Kw ( with power
factor )