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step- up transformer

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15y ago

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What can a DC voltage be produced by?

A: AC recitification and battery source.


Why you need to connect resistor in series for the practical voltage source?

A resistor is connected in series with a practical voltage source in order to determine the current produced by the source.


How does the maximum value of the current depend on the frequency of the AC voltage source?

The maximum value of the current in an AC circuit depends on the frequency of the voltage source. As the frequency increases, the maximum current value also increases.


What type of transformer decreases the voltage produced by the source.?

step-down transformer


Why does the terminal voltage decreases as the load current increases?

A: That will happen anytime the voltage source is not able to provide the power needed for the load. If the load exceed the power available from the source the voltage will be reduced as IR drop from the source


What are depletion and enhancement mosfet?

A depletion MOSFET is a MOSFET that is normally on. It outputs maximum current when the gate-source voltage is 0V. As the gate-source voltage increases, the drain-source channel becomes more resistive and the current decreases. An enhancement MOSFET has the opposite behavior. It is normally off. It outputs no current when the gate-source voltage is 0V. As the gate-source voltage increases, the drain-source channel becomes less resistive and the current increases.


How does capacitor discharge while ac supply is on?

For part of the AC voltage wave, the capacitor will be above the source voltage, and will discharge until the AC voltage wave increases above the capacitor's stored voltage.


Why is voltage of the battery not equal to the voltage across each bulb in parallel connections?

There are two possible reasons. Firstly, due to the internal resistance of the supply source, there is an internal voltage drop within that source, and this increases as load current increases. In other words, the closed-circuit (load) voltage is always lower than the open-circuit (no-load) voltage. Secondly, a voltage drop always occurs along the conductors between the supply source and the load. Again, the greater the load current, the greater this voltage drop. In a well-designed circuit, these two voltage drops should be insignificant.


Can the strength of an electromagnet be changed by changing the voltage of the Power Source?

Yes, the strength of an electromagnet can be changed by changing the voltage of the power source. Increasing the voltage increases the current flowing through the electromagnet, which in turn increases its magnetic field strength. Conversely, decreasing the voltage decreases the magnetic field strength.


What is the relationship between the size of your source and an electric current?

If the source you're talking about is an ideal voltage source, then the amount of current depends on the size of the source and the total resistance of the circuit connected to it. Ohm's Law tells us that the current, I, is directly proportional to the voltage, V, and inversely proportional to the resistance, R: I = V/R So, increasing the voltage increases the current, whereas decreasing the resistance does the same. There are practical limitations to that, however. In the real world, reducing the resistance to zero does not produce infinite current, as suggested by the formula. Infinite current is produced only by "ideal" voltage sources, which don't exist.


If the resistance increases what will happen to voltage and current?

If you have a simple circuit. For eg: One voltage source and one resistor, then the voltage of the circuit will always remain the same, the current however will decrease following Ohms' Law V=I*R. If we have a current source instead of a voltage source, we are forcing the current to be a certain value so if we increase the resistor value the current will remain the same but the voltage will increase.


What is source of voltage?

Energy is the source of voltage