| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
| 24V 20A | |
| 6V 80A | |
| 24V 80A | |
| 12V 40A |
Connecting the 4 batteries in series multiplies their voltage while keeping their current the same yielding a 24V 20A configuration. Connecting the 4 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 80A configuration. Using a series-parallel connection, 2 batteries can be connected in series and 2 can be connected in parallel resulting in a 12V 40A configuration.
An engineer who wants to document an electric circuit would create which of the following?
a matrix |
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a schematic |
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a blueprint |
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a layout |
A schematic is the proper name for a drawing of an electric or electronic circuit.
A __________ electric current produces a magnetic field proportional to the amount of current flow.
moving |
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low voltage |
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high voltage |
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stationary |
A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.
What is the primary difference between a rectifier and an inverter?
a rectifier converts an AC input to DC while an inverter converts a DC input to AC |
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a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion |
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a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion |
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a rectifier converts a DC input to AC while an inverter converts an AC input to DC |
A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.
Which of the following statements about a capacitor is false?
it is safe to touch a capacitor with your hands as long as it is small |
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to discharge a capacitor safely, use a high-wattage resistor comparable to the capacitance of the capacitor |
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a capacitor remains charged even after the input voltage is removed |
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you should always discharge any capacitors before working on an electronic circuit |
The purpose of a capacitor is to retain electric charge and it will do so even after its input voltage is removed. After the input voltage is removed, the capacitor will slowly discharge but, depending on the size and characteristics of the capacitor, discharging could take from a few minutes to a few years. So, it's never safe to touch a capacitor with your hands and you should make sure to discharge any capacitors in a circuit before working on it using an appropriately high-wattage resistor or a capacitor discharge tool.