| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
From what energy do photovoltaic cells produce electrical energy?
magnetic |
|
nuclear |
|
chemical |
|
sun |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.
The farad is a unit of measurement for:
power |
|
inductance |
|
energy |
|
capacitance |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
This circuit diagram represents a(n):
series-parallel circuit |
|
rectifier |
|
series circuit |
|
parallel circuit |
In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.
A solid state device has which of the following characteristics?
made from a mix of conductive and insulative material |
|
made entirely from insulative material |
|
made entirely from conductive material |
|
made entirely from semiconductor material |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.
General current flow in a transistor is from __________ to __________.
collector, base |
|
base, emitter |
|
base, collector |
|
collector, emitter |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.