If the question asks how 13.5 volts can be supplied to a device that draws 20 amps (nominally), the supply responds to the setpoint selected (13.5 volts). The supply's voltage has the ability to actually change as the dynamic resistance of the device it supplies changes. That's weird because we want the voltage to stay the same. The supply is actually changing the amount of current it supplies as the resistance of the load changes, and this will keep the applied voltage fixed at 13.5 volts. How does that work? We know that for a given resistance, if we wish to supply a constant voltage, we will get a fixed amount of current draw. As the resistance changes (goes down) due to thermal effects, the supply will actually deliver more current to maintain the 13.5 volts. In this way, the supply can accomplish voltage regulation. It's classic Ohm's law. The volts equals the current times the resistance. If voltage is to remain constant, then the current times the resistance will have to remain constant. The onlyway this can happen is that as resistance goes down, current must go up. As the device heats up and its dynamic resistance decreases, the current it "demands" to keep the supplied voltage at the 13.5 volts goes up. The supply does all this automatically.
Increased The time constant of an "RC" circuit IS RC. So it's directly proportional to 'R' and also directly proportional to 'C'.
In a shorted circuit, the temperature of the wires increases. This is because the wires are not perfect conductors - they have resistance - so the large fault current that flows generates a voltage across the wires, which then generates power, generating heat.
it can go up or down
That is called electrical current.
You'd need to branch the circuit before the switch. This can be immediately before the switch, in the box that holds the switch, but you can't get constant power from a switched circuit after its been switched.
Resistance increases as temperature increases. If Voltage is held constant then according to Ohm's Law Voltage = Current x Resistance then current would decrease as resistance increases.
Current increases if the voltage remains constant.
Inversely. As resistance increases, current dereases; given that the applied voltage is constant.
Increased The time constant of an "RC" circuit IS RC. So it's directly proportional to 'R' and also directly proportional to 'C'.
When the amount of current passing through a circuit increases, it generally increases the temperature, and consequently the resistance. Simply stated, it is harder for the current to pass through the circuit if the temperature increases. The Large Hadron Collider uses superconductors to pass current to its electromagnets. A superconductor passes current through its circuit materials with almost no resistance at all, generally by supercooling the circuit materials.
If the current through a pure metallic conductor causes the temperature of that conductor to rise, then its resistance will increase. A practical example of this is an electric lamp. The cold resistance of a lamp is very much lower than the hot resistance.
Voltage remains constant; current increases.
A: 1/7
The physical equation governing voltage is V = IR, where V is voltage, I is current, and R is resistance. If V remains constant while R is increased, I or current must decrease. Increasing the resistance in a circuit is simply introducing a material that further resists or impedes the electron flow (current), thus current decreases.
time constant increases. I'll leave the calculation to you as you gave no numbers or relative amounts of change.AnswerThe above answer refers to a d.c. circuit. For an a.c. circuit, increasing the capacitance will reduce the circuit's capacitive reactance, so the impedance will change and the phase angle will reduce.
Answer : increase The time required to charge a capacitor to 63 percent (actually 63.2 percent) of full charge or to discharge it to 37 percent (actually 36.8 percent) of its initial voltage is known as the TIME CONSTANT (TC) of the circuit. Figure 3-11. - RC time constant. The value of the time constant in seconds is equal to the product of the circuit resistance in ohms and the circuit capacitance in farads. The value of one time constant is expressed mathematically as t = RC.
At constant temp.& pressure,on the same circuit,with potential difference unchanged,current reduces if resistance increases.(Ohm's law).