| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
A diode to an electronic circuit is like a _______________ to a city?
parking lot |
|
one-way street |
|
highway |
|
traffic light |
A diode allows current to pass easily in one direction and blocks current in the other direction.
Resistance is opposition to which of the following?
conductance |
|
voltage |
|
impedance |
|
current |
Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.
This circuit component symbol represents a(n):
inductor |
|
potentiometer |
|
resistor |
|
capacitor |
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.
The formula specifying Ohm's law is which of the following?
\(V = {R \over I}\) |
|
V = IR |
|
\(V = {I \over R}\) |
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V = I2R |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
| parallel | |
| orthogonal | |
| perpendicular | |
| series-parallel |
Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 72V 15A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 9V 120A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 36V 60A configuration.