Physics Flashcards - Chapter 9 0.0 / 5 PhysicsD.C. ElectricityASOCR Created by: Ryan AlexanderCreated on: 14-03-17 13:42 Name this Circuit symbol: Diode 1 of 14 Name this Circuit symbol: Thermistor 2 of 14 Name this Circuit symbol: LED (Light-emitting diode) 3 of 14 Name this Circuit symbol: LDR (Light-dependent resistor) 4 of 14 Name these Circuit symbols: Voltmeter and Ammeter 5 of 14 What is the equation linking Potential difference, Work done and Charge? Potential difference = Work done / Charge 6 of 14 What is 1 V in base units? 1 J C-1 = 1 kg m2 s-3 A-1 7 of 14 What is the definition of Potential difference? The work done transferring energy from electrical to other forms, per unit charge. 8 of 14 What is the definition of EMF? The work done transferring energy from other forms to electrical, per unit charge. 9 of 14 What equations can you use to calculate the work done? Work done = Potential difference x Charge, or, EMF x Charge 10 of 14 If the work done on one electron = gain in kinetic energy, what equation can you use? eV = 1/2 x m x v (squared) 11 of 14 What is the equation linking resistance, potential difference and current? V = IR, Potential difference = Current x Resistance 12 of 14 What is the unit of Resistance? What is it in base units? Ohm, 1 Ohm = 1 V A-1 = 1 kg m2 s-3 A-2 13 of 14 What is Ohm's Law? The current is directly proportional to the potential difference in a wire, provided its kept at a constant temperature. 14 of 14

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