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Circuits
Overachieving and under-appreciated, circuits are the foundation that our technological society is built on. Now's your chance to find out not only how they work, but why. Questions regarding the physics behind voltage, resistance, capacitance, inductance, transistors, LEDs, switches, and power supplies; and how they're used to create analog and digital circuits, should be directed here.
1,646 Questions
Why do electric circuits have to be complete?
if they're not then the circuit will not work and it won't be able to power wat u want it to power for example a lightbulb.it will be an open circuit
When a network has 10 nodes and 17 branches in all then the number of node pair voltages would be?
Answer #1 . . . . . 9
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Answer #2:
You're asking how many ways I could attach a voltmeter to the circuit
and measure the voltage between two nodes.
The first point could be any one of the 10 nodes.
The second point could be any one of the 9 remaining nodes.
So there are (10 x 9) = 90 ways to connect my voltmeter.
But for each one, there's another one that's just the same two points
but with opposite polarity.
So there are 90/2 = 45 distinct different pairs of nodes.
The number of branches in the circuit is irrelevant.
This question is the electronic version of the old handshake puzzle.
Do ceiling fans have a capacitor?
Yes! Ofcourse:) it's just above the motor:) it is in cylindrical form
How is the total current in a parallel circuit worked out?
You add up the currents in each branch. The current in each branch is just
(voltage acrossd the parallel circuit)/(resistance of that branch) .
==================================== If you'd rather do it the more elegant way, then . . .
-- Write down the reciprocal of the resistance of each branch.
-- Add up the reciprocals.
-- Take the reciprocal of the sum. The number you have now is the
'effective' resistance of the parallel circuit ... the single resistance
that it looks like electrically.
-- The total current through the parallel circuit is
(voltage acrossd the parallel circuit)/(effective resistace of the parallel circuit) .
What is the use of force notifier files in gate level simulation of digital circuits?
The notifier is the value in the specify block that is triggered to possibly cause X output from library cells (gates). This triggering occurs when you have a timing violation. So when we want that the particular flop should not drive X on the timing violation we generally force its corresponding notifier to '1' or '0' so that it wont propagate X
a monolithic ADC is an integrator-based analog-to-digital converter. Simply put, the input voltage signal is integrated, compared to a reference voltage, and converted into a digital representation. The integrator uses a reference capacitor (hence monolithic i imagine), which is chosen depending on the bandwidth of the input signal.
Don't take my word for it, see for yourself. The ICL7135 for example is a monolithic ADC with 4 and 1/2 digits BCD output.
What voltage is required to pass 0.5 A of current through a 4.5-W BULB?
9 volts
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The question is a bit convoluted.
The power dissipated by the bulb and the current through it
both depend on the voltage applied across it.
In the real world, the way to ask this question would have to be:
If a light bulb dissipates 4.5 W of power when 0.5 A of current
passes through it, what voltage has been applied across it ?
(And, for extra credit, what is the bulb's effective resistance ?)
Advantage of double circuit distribution line?
1. initial cost is low
2. reduce the loss by reducing the resistance
Circuit breakers and fuses are both devices that protect an electric network by
automatically opening a circuit when the current exceeds a predetermined level.
What is transient response in circuit analysis?
transient response is due to exponential behaviour and its die with time,its not permanent.
Where would you get alternating current?
You can manufacture your own alternating current, using an oscillator and amplifier
capable of outputting significant power. But it's a lot easier to just get it from one
of the electrical outlets in your house, since that's what the utility company generates
and distributes.
How do you increase the brightness of a blub in a simple circuit?
Brightness can increased by increasing current flowing through the bulb, but current can be increased only indirectly, by
1. Increasing the Voltage across the bulb
2. Reducing the Resistance of the bulb.
Brightness is proportional to Heat energy used/produced, which is = I*I*R*T
I= Current
R=Resistance
T= Time
List 5 components of a circuit and explain their functions?
The 4 main components of a circuit are:
(1) Switch - turns electric current on and off, closes and opens a circuit.
(2) Load - resists the flow of current and converts electrical energy into another form of energy (ex. light bulb)
(3) Wires - thin strips of insulated copper conducts the electric current, allowing it to pass through like a pathway, makes up the circuit.
(4) Source - gives the circuit the required electrical energy
A resistor can also be included as one of the components
150 mA is.
Why is a transformer necessary?
A transformer is not 'necessary'. The human race evolved, and developed
cultures, societies, disease resistance, and technology, without ever
seeing a transformer.
But there are specific situations in which desirable things can be accomplished
much more effectively and efficiently with a transformer than with any other
device or method. Here are a couple of examples:
-- If the voltage you have available is not the voltage you need, then you can
use a transformer to make the change. (But that only works for AC.)
-- You can use a transformer to change the output impedance of an amplifier
to the impedance of the speaker or earbuds you want to use with it.
What does the M mean on a electrical circuit?
It most likely stands for the Mutual Inductance seen between two inductors.
(15 volts) x (10 Amps) = 150 watts
