Term
| What is the value and unit of Planck's constant (h)? |
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Definition
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Term
| What is the value and unit of e (elementary charge)? |
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Definition
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Term
| What is the definition of 'mean drift velocity'? [2] |
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Definition
| The average distance travelled by an electron along a wire per unit time [1] This is in one direction, and is slowed down by collisions with the metallic lattice [1] |
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Term
| What is meant by the term 'current'? |
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Definition
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Term
| What is the area under a current-time graph? [With a reason] |
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Definition
| Charge flow, because Q=It |
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Term
| What is Kirchoff's first law, and what does it show the conservation of? |
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Definition
| Sum of currents entering a junction is equal to the sum of currents exiting that junction, shows conservation of charge |
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Term
| The number of electrons per unit volume, is also known as what? (and give the units for this measurement) |
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Definition
| Number density, measured in m^-3 |
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Term
| What is the number density of semiconductors, relative to conductors and insulators? [e.g. more or less] |
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Definition
| Semiconductors have more electrons per unit volume than insulators, but less than conductors [they have ~10^18 m^-3] |
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Term
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Definition
| For a metallic conductor at constant temperature, current through the conductor is directly proportional to potential difference across its ends |
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