| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
In a series circuit, which of the following is the same across all branches of the circuit?
conductance |
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voltage |
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resistance |
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current |
A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.
The hertz is a unit of measurement for:
power |
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frequency |
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energy |
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inductance |
The hertz is a unit of measurement for frequency.
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
negative, positive |
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negative, negative |
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positive, positive |
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positive, negative |
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.
The valence shell of a semiconductor is how full of electrons?
more than half full |
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empty |
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less than half full |
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half full |
Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.
The conversion of alternating current (AC) into direct current (DC) is called:
rectification |
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inductance |
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reactance |
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capacitance |
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.