GCSE Physics Paper 1 Electricity 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: Burney7Created on: 15-11-20 19:50 What is an electric current? The rate of flow of charge. Measured in Amps (A) 1 of 30 What is a series circuit? A circuit where the current can flow in only one path. 2 of 30 What is used to measure the current in a circuit? An ammeter. 3 of 30 How is the current distributed in a series circuit? The current is the same everywhere. 4 of 30 How can you calculate the current? I (current) = Q (charge) / t (time) 5 of 30 What is a parallel circuit? A circuit that contains branches that the current flows through both. 6 of 30 How is the current distributed in a parallel circuit? The current splits at a junction. The current in the branches add up to the total current leaving a cell. 7 of 30 What is potential difference/voltage? The energy transferred per Coulomb of charge in a circuit. Measured in Volts (V) 8 of 30 How is voltage measured? With a voltmeter in parallel. 9 of 30 How is p.d/voltage distributed in a series circuit? The voltage is shared between components. The voltage in components add up to the total voltage of the cell. 10 of 30 How is p.d/voltage calculated using the resistance? V (voltage) = I (current) x R (resistance) 11 of 30 How is p.d/voltage calculated using the energy transfer? V (voltage) = E (energy transferred) / Q (charge) 12 of 30 How is p.d/voltage distributed in a parallel circuit? The voltage is the same in each component. 13 of 30 What is a battery? More than one cell connected in the same direction. 14 of 30 What is charge? Electrons in a circuit. Measured in Coulombs (C) 15 of 30 What is resistance? Opposition to the flow of current Measured in Ohms (Ω) 16 of 30 What is a resistor? A component that increases resistance. 17 of 30 What does an I-V graph of a resistor (when the temperature is constant) tell us? A resistor is an ohmic conductor. The current is directly proportional to the voltage 18 of 30 What is Ohm’s Law? The current is directly proportional to the voltage when kept at a constant temperature. 19 of 30 How is the I-V graph of a filament lamp different to a resistor? The current is not directly proportional to the voltage. A filament lamp is not an Ohmic conductor. 20 of 30 Why is the current of a filament lamp not directly proportional to the voltage? The filament gets hot causing the resistance to increase. 21 of 30 What is a diode? A component that lets the current flow in only one direction. This is because it has a very high resistance in the opposite direction. 22 of 30 How is the I-V graph of a diode different to a resistor? The current is not directly proportional to the voltage. A diode is not an Ohmic conductor. 23 of 30 Why is the current of a diode not directly proportional to the voltage? The current only flows in the forward direction and not in the reverse direction in the graph. 24 of 30 What is an LED? A diode that gives off light when a current flows through, which makes them very energy-efficient 25 of 30 How is the total resistance of resistors calculated in a series circuit? Adding the resistance of the components together. 26 of 30 What is an LDR? A resistor that changes depending on the light intensity. 27 of 30 What happens to the resistance of an LDR if the light intensity increases? The resistance decreases and vice versa. 28 of 30 What is a thermistor? A resistor that changes depending on the temperature 29 of 30 What happens to the resistance of a thermistor if the temperature increases? The resistance decreases and vice versa. 30 of 30
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