| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
Which of the following is not a purpose of a resistor in an electrical circuit?
limit the current in the circuit |
|
control the voltage in the circuit |
|
moderate the heat in the circuit |
|
multiply the current in the circuit |
Resistors can be chosen in a wide variety of values to control the voltage in a circuit, limit the current, or moderate the heat produced by the components in the circuit.
An engineer who wants to document an electric circuit would create which of the following?
a blueprint |
|
a matrix |
|
a schematic |
|
a layout |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Which of the following is the same for each branch of a parallel circuit?
current |
|
power |
|
voltage |
|
resistance |
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.
The volt is a unit of measurement for:
capacitance |
|
voltage |
|
current |
|
power |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
positive, negative |
|
negative, negative |
|
positive, positive |
|
negative, positive |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.