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Does a transistor allows control of large currents with small current signals?

In: Electronics Engineering [Edit categories]

Answer:

Yes. The ratio of collector current and base current is DC gain, also known as beta, or hFe.

First answer by Alex146. Last edit by Alex146. Contributor trust: 419 [recommend contributor ]. Question popularity: 2 [recommend question].

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What is designed to use a small current to control a large current?
A silicon controlled rectifier falls into this category.
What makes small and large electric currents?
The combination of supply voltage and load. For any given supply voltage, the greater the load (i.e. the lower its resistance), the greater the resulting current.
How do you control current?
Electrical current can be changed using a variable resistor. A resistor can be selected to allow a certain current at a specific voltage. Ohms' Law.
Why is the base current in a transistor very small?
Because a transistor's collector current is proportionally limited by its base current, it can be used as a sort of current-controlled switch. A relatively small flow of electrons sent through the...
Is a wireless signal alternating current or direct current?
Wireless signals are alternating current.