| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
Which of the following statements about electrical resistance is true?
the more resistive the conductor is the faster electron flow will be |
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electrically conductive materials have no resistive properties |
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the less resistive the conductor is the slower electron flow will be |
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the more resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
Which of the following is not a common type of battery?
deep-cycle |
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power-cycle |
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dry cell |
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wet cell |
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 three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).
The conversion of alternating current (AC) into direct current (DC) is called:
capacitance |
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inductance |
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rectification |
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reactance |
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.
Why does current in an electric circuit create heat?
voltage is naturally hot |
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heat is created when the current overcomes resistance in the wire |
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current is naturally hot |
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the wire in the circuit burns when current passes through |
Current in an electric circuit creates heat when the current overcomes resistance in the wire.
Longer the electrical wires mean _______________ voltage drop.
complete |
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diminishing |
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greater |
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lesser |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.