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If the voltage is so high of the order of 20,000 to 30,000 volts or higher (which is high enough to ionize air between the power terminal and the nearest negative terminal/ground, chances are that you'll get a spark even before you touch the ground. However, once the terminal is grounded, current just flows down through to the ground and all you end up with is wastage of power...it does nothing. However, whether it sparks the way it does with a lightning bolt (a step leader followed by several return strokes that all apear as one single spark because it happens so quickly) or whether you end up with streaks of light as in st.elmo's fire will depend on the shape of your power terminal. Spherical surfaces have a lower surface charge density as compared to pointed surfaces so you're likely to get a plasma like formation with a pointed power terminal. In any case, once grounded, the current just flows down to the ground and that's the end of it - power wasted!
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What is voltage divider circuit?
The two resistor voltage divider is used often to supply a voltage different from that of an available battery or power supply. In application the output voltage depends upon the resistance of the load it drives.
What is vsb in power supply?
Voltage Standby
What is the typical electrical voltage supply in European countries?
About 240 volts.
What do you Mean dual tracking power supply?
It's a power supply with a positive and negative voltage, where one of the voltages tracks the other. For example: the negative voltage tracks the positive. If you regulate the positive to 15v, the negative is going to be -15v. This allows very precise symmetric power.
Why for an ideal power supply the output voltage is independent of the load?
Obviously, you don't want the voltage to sag. For computer power supplies, you want the power to be even, pure, and clean without any ripple.
Why current transformer should be grounded?
If there is a short circuit between the transformer's high-voltage windings and its core (or any other metal parts, come to that) the fault will be recognised by the high-voltage supply's protective system, which will quickly disconnect the high-voltage line. For this to happen, the metal parts of the transformer, including its core and metal container, must be earthed or grounded to provide an electrical path back to the source of the high voltage.
Will you get a electric shock when the negative terminal of the dc power supply is grounded and the positive terminal is held by us?
Only if we are also in contact, directly or indirectly, with ground. By ohm's law, current is voltage divided by resistance. Conductance is the inverse of resistance, so current is voltage times conductance. No conductance - no current.
What measure did they employ to lessen the resistance?
We can reduce the supply voltage from the ohms law relation.......v=ir... resistance is directly proportional to supply voltage...or.....we can control the resistance by the relation by R is directly proportional to l/a l=length a=area
What happen if the value of the dc supply is changed in amplitude modulation?
The rf output voltage should be proportional to the signal voltage in AM. A change in the DC supply voltage should also cause a proportional change to the rf output voltage.
What will happen if you connect 220v bulb in parallel to 100k ohm resistances with supply of 440 v?
This bulb is very likely to be burn out since the 440 supply voltage is very higher than it's rated voltage.
Why clipping happen for op-amp?
Clipping occurs in the voltage waveform when the input voltage, multiplied by the voltage gain of the op-amp circuit, exceeds the op-amp supply voltage as limited by the output network. The supply voltage and output network, limits the maximum voltage that can be achieved at the output. The op-amp behaves normally within its range of maximum voltage output, and then it is clipped when it reaches the maximum voltage of the circuit.
How can you get 12volts supply from speaker?
You can not. Speakers do not supply a voltage they need a voltage to operate correctly.
What happen if the secondary side of step down transformer supply a bigger voltage?
it would be called a step up transformer
What are some exceptions to the rule of always being grounded when you work with PCs?
When working inside a monitor, inside a power supply or inside another high voltage peripheral such as a laser printer or scanner. The reason is that these components contain a powerful electrical charge even after they are disconnected from power. You don't want to be grounded because you provide yourself as a conduit for the voltage to discharge through, which would suck.
Does kitchen sink need to be grounded?
It is already grounded through the faucet and water pipes. Even if the supply lines are PVC, it will still be grounded through the water.
Why starting current of the motor is high when it is directly connected to supply voltage?
When a motor is stationary, it is not generating a back-mmf which would otherwise act to oppose the applied voltage and, thus, reduce the supply current. However, as the motor runs up to speed, it generates an increasing back-emf, and the supply current falls.
Do you add electrical supply voltage and induced voltage of a coil to get total voltage on the coil?
The induced voltage acts to oppose any change in current that is causing it. So, if the current is increasing, then the induced voltage will act in the opposite direction to the supply voltage; if the current is decreasing, then the induced voltage will act in the same direction as the supply voltage.
