Topic P3: Electricity; Flash Questions 0.0 / 5 ? PhysicsElectricityGCSEOCR Created by: MiriamLCreated on: 15-11-19 13:49 What do all materials contain? Positive and negatively charged particles, usually equal in number making them overally neutral 1 of 30 What does the transfer of electrons from one negatively charged material to another create? One positively charged materail and one negatively charged 2 of 30 How do we cause this transfer? Friction (rubbing) 3 of 30 Which material is positive The one that looses electrons 4 of 30 Which material is negative The one that gains electrons 5 of 30 What do oppositely charged obkects do? Attract 6 of 30 What do similarly charged objects do? Repel 7 of 30 What is the region around a charged object called electric field 8 of 30 What do field lines show? The direction a positive charge would move in placed in the field 9 of 30 What is needed for a current to flow? A potential difference (voltage) abd a conductor 10 of 30 current= charge/time 11 of 30 Q= I*T 12 of 30 What does the size of the current depend on? Voltage of the power supply and resistance of the cirucit. 13 of 30 Energy= charge*potential difference 14 of 30 Energy= current*time*pd 15 of 30 What two things do you need to make a current flow? Cell/battery and a complete circuit 16 of 30 What is the current everywhere in a single closed loop? The same 17 of 30 Charge flow= current*time 18 of 30 What are small currents measured in milliAmps (mA) 19 of 30 What is needed to make a current flow in a circuit? Potential difference 20 of 30 What happens in a battery? Substances react to seperate charges making one side positive and another negative 21 of 30 Which charged terminal has the higher electrical potential? Positive 22 of 30 What does the potential difference and current that a cell can deliver dependant upon? Construction of the cell (not the size) 23 of 30 What does the longer line on a symbol for a cell show? Positive 24 of 30 What happens when you apply a pd between the ends of a piece of wire? You set up an electrical field 25 of 30 When you connect a voltmeter acriss a componenet in a circuit what are you measuring? Work done or energy transferred by the charges in the component. This is called electrical working 26 of 30 Energy transferred= potential difference*charge 27 of 30 What can you measure current with? Why must this be in the loop? Ammeter. The charge needs to flow through them 28 of 30 Where do you need to connect a voltmeter? Both sides of a component 29 of 30 If you measure the currents at different points in a parralel citcuit what should they add up to? The current near the battery 30 of 30
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