| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
A diode to an electronic circuit is like a _______________ to a city?
one-way street |
|
parking lot |
|
highway |
|
traffic light |
A diode allows current to pass easily in one direction and blocks current in the other direction.
What is the voltage of most household electrical systems in the United States?
110V |
|
220V |
|
60V |
|
60Hz |
Most households use electricity with a voltage of 110V.
Which of the following is not a characteristic of a step-up transformer?
increases voltage |
|
has more turns in the secondary winding than in the primary winding |
|
the primary voltage is higher than the secondary voltage |
|
the secondary voltage is higher than the primary voltage |
As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.
| 180V 300A | |
| 90V 15A | |
| 9V 150A | |
| 45V 75A |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 15A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 9V 150A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 75A configuration.
This circuit component symbol represents a(n):
potentiometer |
|
resistor |
|
capacitor |
|
inductor |
Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.