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What is the level of drain current ID for gate-to-source voltages VGS less than more negative than the pinch-off level?
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Does current always go from positive to negative?
We call this Conventional Current Flow, where imaginary positively charged particles are repelled away from a positive charge and attracted towards a negative charge.The reality is that electrons are actually flowing through the conductor. Electrons are negatively charged particles and flow from negative to positive. It's just easier to think of a positive current flowing than a negative current.
The indication of the negative or positive pole of an electric current is?
Electrode
What current has a negative sign and what does it indicate?
Electrical current in copper is the flow of electrons which are negaitve charge particles. In a typical battery, electrons flow from the negative (bottom) side to the positive (top, nipple) side. However, the engineering convention is to call the "plus" side of the battery the source so current is said to flow from the plus side to the negative side -- which is the opposite to the physical flow of electrons.
What is the function of grid?
it accelerate the motion of electron emitted by the filament if given a positive charge, similarly if negative voltage to grid the current flow through the grid is reduced. the more positive grid shows less current.
Why voltage have negative sign?
The strength of a electrical flow is measured in Voltage and Electrons are negative. Alternating current (AC) oscillates between positive and negative as the direction of flow periodically reverses direction. An alternating current of 60Hz therefore changes direction 60 times a second, and can be visualised as a sine wave that oscillates above and below the zero baseline, with a period (a complete cycle) of 1/60th of a second. Direct current (DC) infers constant polarity, meaning the direction of flow is unidirectional (one direction only). While DC can oscillate as a full-wave rectification or a half-wave rectification, it is always indicated as a positive voltage (the line or wave is always above the zero baseline). A voltage or current indicated with a negative symbol therefore implies alternating current although AC is more correctly indicated by the ± symbol. Direct current is generally indicated by a long horizontal bar above three short horizontal bars.
What is over frequency?
when the current increases in voltages.
What is the meaning of voltages?
D.C. stands for direct current. A.C. is alternating current.
Do voltages vary around the circuit and why?
A: Voltages varies on a circuit because current varies caused by difference in resistance
Why can wire sizes be smaller when higher system voltages are used?
It has to with the fact that when voltages go higher the current goes lower. The lower the current a device draws, the smaller the wire size needs to be to carry that current.
What is physical meaning of slope for voltages vs current graphs?
According to Ohm's Law, R = V/I, the physical meaning of slope for voltages vs current graphs is resistance.
What is the cause of an electric current?
Electric currents are caused by voltages.
Electric current from a generating plant is?
Electric current from a generating plant is a alternating current transmitted at high voltages, but usually used at low voltages.
Which is more dangerous AC current or DC current when the voltages are equal?
either one, neither one
Can current be negative?
A negative current only signifies direction.
Why you use resisters in circuits?
To adjust/control/set voltages and/or restrict current.
Why you use resisters in your circuit?
To adjust/control/set voltages and/or restrict current.
What is the basic difference between dc current and ac current?
AC (Alternating Current) - It fluctuates from +ve to -ve (Ie- positive voltage to negative voltage), it does this constantly, hence why it alternates. DC (Direct Current) - It has a constant supply of electricity but the voltage does not change at all. It goes in one direction ONLY. Main difference: AC changes the voltages from positive to negative CONSTANTLY (current goes up & down), and DC has a continuous supply of current which flows IN ONE WAY.
