Physics-Electricity 4.0 / 5 based on 1 rating ? PhysicsNational 5SQA Created by: JamieH98Created on: 08-04-13 21:55 How do calculate charge? Q=It (Charge=Current×time) 1 of 28 What is current? Current is the rate at which charge flows; it is the amount of charge passing in 1 unit of time 2 of 28 what can electrons do in a conductor? Electrons are free to move in a conductor 3 of 28 In an insulator what are the electrons like? In an insulator all the electrons are all bound in the atom 4 of 28 How do you measure current in a circuit experiment? To measure current you place an ammeter in series into a circuit 5 of 28 What is the voltage of a supply? The voltage of a supply is a measure of the energy given to the charges in a circuit. 6 of 28 What is voltage measured in? Measured in Volts 7 of 28 How do you measure voltage in a circuit experiment? A Voltmeter is placed across the component being measured in parallel 8 of 28 What does the brightness of a light tell us? The brightness of the lamp is a measure of the energy supplied 9 of 28 If the power supply increases what happens to the voltage and brightness? As the power supply increases as does the voltage and so the brightness increases 10 of 28 What is an electric current? Voltage applied to a circuit provides energy and causes charges to flow and the rate of flow of charge is called electric current. 11 of 28 What does increasing the resistance do to the current? Increasing the resistance decreases the current 12 of 28 How do you measure resistance? R=V/I (Resistance=Voltage/Current) V=IR 13 of 28 In a series circuit how many routes are there for the energy to flow? In a series circuit there is only one route for the charge to flow 14 of 28 What is the same in a series circuit? In a series circuit the current is the same at every point in the circuit 15 of 28 What adds up to the supply in a series circuit? In a series circuit the voltage adds up to the voltage of the supply 16 of 28 In a parallel circuit how many routes are there for the energy to flow? In a parallel circuit there is more than one path for the charges to flow 17 of 28 what adds up to the supply in a parallel circuit? In a parallel circuit the current adds up to the current of the supply 18 of 28 What is the same in a parallel circuit? In a parallel circuit the voltage is equal everywhere 19 of 28 Describe the energy transfers in a lamp? In a lamp electrical energy is transformed into heat and light energy 20 of 28 What is power? Power is the rate at which energy is transformed 21 of 28 What is energy measured in? Energy is measured in J 22 of 28 How do you calculate energy? E=P×t 23 of 28 How do you calculate power given the current and the voltage? P=I×V 24 of 28 Show the equation for current in a parallel circuit? It=I1+I2=I3 25 of 28 Show the equation for current in a series circuit? It=I1=I2=I3 26 of 28 Show the equation for voltage in a parallel circuit? Vt=V1=V2=V3 27 of 28 Show the equation for voltage in a series circuit? Vt=V1+V2+V3 28 of 28

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