4609439
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Flashcards by Ross Carmichael, updated more than 1 year ago
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| Question | Answer |
| Components that are connected one after another on the same loop of the circuit are connected... | ...in series. |
| The current that flows through each component connected in series is... | ...the same. |
| If Christmas tree lights all go out when one bulb breaks what type of circuit is this? | Series Circuit. |
| What is a circuit? | A closed loop through which current flows - from a power source, through a series of components, and back into the power source. |
| What is current? | Moving electric charges, for example, electrons moving through a metal wire. |
| What is a fuse? | An electrical component that protects circuits and electrical devices from overload by melting when the current becomes too high. |
| What is potential difference? | The voltage between two points that makes an electric current flow between them. |
| Components that are connected on separate loops are connected in....... | Parallel. |
|
If the circuit is completed by the switch closing which bulb(s) will light?
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Both. |
|
Which circuits are series and which are parallel?
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The top two are series the bottom two are parallel. |
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The Oscilloscope trace shows which type of current?
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Alternating current (A.C) |
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The Oscilloscope traces shows which type of current?
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Direct Current (D.C) |
| What happens to the resistance of a filament bulb during normal operation? | It increases as the current through it increases because the current increases the temperature. |
| If you know the potential difference of a cell, how would you work out the total potential of a battery made up of these cells? | Add up the potential difference of each cell. |
| What is special about a thermistor? | Resistance decreases if temperature increases. |
| What is a battery? | Two or more cells connected together. |
| What is special about an LDR? | Resistance decreases if the light intensity on it increases. |
| In a parallel circuit what is the relationship between the potential difference across each branch and the potential difference of the power source? | They are the same. |
| How do you find the total resistance of all the components in a series circuits? | Add up the individual resistances. |
| What is the definition of an electric current? | The rate of flow of charge. |
| What does Ohm’s law state? | The current through a resistor at constant temperature is directly proportional to the potential difference across the resistor. |
| What is the same at all points in a series circuit? | Current. |
| How would you calculate resistance if you were given the potential difference across a component and the current flowing through it? | R=V/I R = resistance, V = potential difference, I = current |
| What is the definition of power? | The energy transferred per second. |
| How would you find the total current coming out of a cell in a parallel circuit? | Add up the currents in each branch of the circuit. |
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