| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
What type of current flows in only one direction in a circuit?
alternating |
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series |
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parallel |
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direct |
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.
Inductance is a factor in which of the following?
a DC circuit |
|
an AC circuit |
|
determining energy stored by a capacitor |
|
batteries connected in serial |
Inductance is a property of an AC circuit (or a component in an AC circuit) that quantifies resistance to changes in current. The current in an AC circuit is continuously changing and inductive reactance (the opposition to change) depends both on the inductance of the circuit or component and the rate at which the current is changing.
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
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one-way street |
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highway |
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parking lot |
A diode allows current to pass easily in one direction and blocks current in the other direction.
You would measure the amount of current through a circuit with a(n):
ammeter |
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potentiometer |
|
battery |
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voltmeter |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.
Why is an insulator a poor conductor of electricity?
an insulator has few free electrons |
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an insulator has many free electrons |
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an insulator is made of organic material |
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an insulator is made of inorganic material |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.