888e-23e5fd0058d6","topicSlug":"resistance","cards":[{"id":"a482b09a-b2d3-4e4d-8e21-605015bb7022","cardType":"basic","front":"A 6.0 V battery is connected to a circuit. How much energy is transferred per coulomb of charge?","back":"6.0 J","points":1,"mcqOptions":[{"text":"6.0 J","correct":true,"explanation":"Potential difference is the energy transferred per coulomb of charge. Therefore, a 6.0 V battery transfers 6.0 joules for every coulomb that passes through it."},{"text":"36 J","correct":false,"explanation":"This comes from squaring the potential difference, but energy transferred per coulomb is equal to the voltage itself. The correct value is 6.0 J."},{"text":"1.0 J","correct":false,"explanation":"This treats the voltage as though it must be divided by the charge, even though the question asks for energy per coulomb. The correct value is 6.0 J."},{"text":"0.17 J","correct":false,"explanation":"This results from taking the reciprocal of the voltage, which reverses the required relationship. Energy transferred per coulomb equals the potential difference, so the correct value is 6.0 J."}]},{"id":"7c9f303c-272b-4902-82c8-6e3ea401f829","cardType":"basic","front":"How must an ammeter and voltmeter be connected to measure the $I-V$ characteristic of a component?","back":"

Ammeter in series with the component
Voltmeter in parallel across the component

","points":2,"mcqOptions":[{"text":"

Ammeter in series with the component
Voltmeter in parallel across the component

","correct":true,"explanation":"An ammeter measures the current through the component, so it must be in series. A voltmeter measures the potential difference across it, so it must be connected in parallel."},{"text":"

Ammeter in parallel with the component
Voltmeter in series with the component

","correct":false,"explanation":"The connection types have been swapped. An ammeter has very low resistance and belongs in series, while a voltmeter has high resistance and is connected in parallel across the component."},{"text":"

Ammeter in series with the component
Voltmeter in series with the component

","correct":false,"explanation":"Although the ammeter connection is correct, putting the voltmeter in series greatly increases the circuit resistance and prevents accurate measurement. The voltmeter must be connected in parallel across the component."},{"text":"

Ammeter in parallel with the component
Voltmeter in parallel across the component

","correct":false,"explanation":"Although the voltmeter connection is correct, an ammeter must not be placed in parallel because its very low resistance can cause a large current. It must be connected in series."}]}]}],"examCountdown":{"examDate":"2027-05-21","paperLabel":"Component 1"},"heading":"Resistance","title":"Resistance Flashcards","topbar":{"backHref":"/a-level/physics/eduqas/flashcards"},"topicSidebar":"$L33"}]}],"topicId":"22fd6a5c-7d18-58d7-888e-23e5fd0058d6","walled":"$L34"}],"$L35","$L36"]