 |  Current Electricity 22 Flashcards |  Start |
 | What is the S.I. unit of electric current? |  Card: 1 / 22 |
| Ampere | Card: 2 / 22 |
| The conventional direction of current flow is along the direction of ___ charge. | Card: 3 / 22 |
| Positive  | Card: 4 / 22 |
| In a balanced Wheatstone bridge, the relationship between resistances is defined by the equation ___ = ___. | Card: 5 / 22 |
| P/Q = R/S  | Card: 6 / 22 |
| True or False: An ideal ammeter has infinite resistance. | Card: 7 / 22 |
| False; an ideal ammeter should have zero resistance. | Card: 8 / 22 |
| Fill in the blank: The formula for the resistance of a conductor is R = ρL/A, where ρ is the ___. | Card: 9 / 22 |
| Resistivity | Card: 10 / 22 |
| The relationship between the temperature coefficient of resistance and resistance is given as Rt = R0 [1 + αt]. What does α represent? | Card: 11 / 22 |
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| The temperature coefficient of resistance | Card: 12 / 22 |
| When using Kirchhoff’s first law, what does the algebraic sum of currents at a junction equal? | Card: 13 / 22 |
| Zero | Card: 14 / 22 |
| True or False: The resistance of semiconductors increases with temperature. | Card: 15 / 22 |
| False; the resistance of semiconductors decreases with temperature.  | Card: 16 / 22 |
| What is the relationship between current and voltage in an ohmic conductor? | Card: 17 / 22 |
| It is a linear relationship, represented by V = IR.  | Card: 18 / 22 |
| The internal resistance of an ideal cell is ___ . | Card: 19 / 22 |
| Zero | Card: 20 / 22 |
| What is the effect on resistance when a wire is stretched to reduce its radius to 1/nth of its original value? | Card: 21 / 22 |
| Its resistance increases by n4 times. | Card: 22 / 22 |
| Completed! Keep practicing to master all of them. |  Restart |
