level: Current, potential difference, power and resistance
Questions and Answers List
level questions: Current, potential difference, power and resistance
| Question | Answer |
|---|---|
| describe voltage in a series circuit | voltages in a series circuit combine to give the supply voltage |
| describe voltage in a parallel circuit | voltage across branches is the same |
| describe current in a series circuit | current is the same at all points |
| describe current in a parallel circuit | currents in parallel branches combine to give the supply current |
| what are potential divider circuits | circuits in which voltage is split between two components |
| what is a wheatstone bridge circuit | a circuit where two potential divider circuits are connected in parallel |
| what are potential divider circuits used for | to provide a specific voltage to a component |
| how do you calculate the voltage across the voltmeter in a wheatstone bridge | look at the terminals of the battery to identify which way current flows calculate the voltage across the two resistors that current first passes through (use potential divider formula or ratios) find the difference between the two voltages |
| what does it mean when the voltmeter on a wheatstone bridge reads 0? | the wheatstone bridge is balanced r1/r2=r3/r4 |