Current Electricity 0.0 / 5 ? PhysicsCurrent ElectricityGCSEAQA Created by: Sam EvansCreated on: 18-03-15 18:16 What sort of charge does an electron have? Negative 1 of 11 In terms of electrons, how does an insulator become positively charged? It loses electrons 2 of 11 What sort of force will there be between two negatively charged objects? A repulsive force 3 of 11 If the current through a component is 0.2A when the potential difference across it is 12 VV, what is its resistance? 60 Ohm's 4 of 11 The energy transferred to a bulb is 36 J when 8.0 C of charge passes through it. Calculate the potential difference across the bulb. 4.5V 5 of 11 What is an ohmic conductor? A conductor that obeys Ohms's law 6 of 11 Explain the shape of the line on a current-potential difference graph for a diode. The resistance in one direction is very high, so there is no current. In the opposite direction the resistance is lower so current will flow. 7 of 11 A series circuit contains a variable resistor. If its resistance is increased, what happens to the pd across it? The potential difference across it increases 8 of 11 A 5 Ohm resistor and an 8 Ohm resistor are connected in series. What is their total resistance? 13 Ohms 9 of 11 Where should an ammeter and a voltmeter be placed in a circuit to measure the current through, and the pd across a resistor? The ammeter should be placed in series and the voltmeter in parallel with the resistor. 10 of 11 A 4 Ohm resistor and a 12 Ohm resistor are connected in series with a 12V battery. What is the current in the circuit? 0.75A 11 of 11
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