Revision: Current Electricity 15 Current Electricity - Revision Quiz Test your understanding of Current Electricity here: 1 / 5 1) What does 5 A refer to? 5 C of charge flowing through a point. 5 V of electricity across 1 Ω of resistance. 5 C of charge flows through a point in 1 second. 5 V of electricity causing 1 C of charge to flow. 2 / 5 2) Which of the following is an equivalent unit for potential difference? A C-1 J C-1 J s-1 C s-1 From the equation E=W/Q the units of Volts must be identical to the units of Joules per Coulomb 3 / 5 3) The graph shows the variation of current, I in a lamp with potential difference, V across it. From the graph, which statement about the resistance of the lamp is correct as the potential difference increases? Resistance of the lamp increases. Resistance of the lamp increases at first then decreases. Resistance of the lamp decreases. Resistance of the lamp decreases at first then increases. 4 / 5 4) Which of the following shows the correct units for electric current and electric power? Electric Current: coulombs per secondElectric Power: volt amperes Electric Current: coulomb secondsElectric Power: volts per ampere Electric Current: coulomb secondsElectric Power: volt amperes Electric Current: coulombs per secondElectric Power: volts per ampere Q = It Thus I = Q/t => coulombs per second P=IV => ampere volts (or volt amperes) 5 / 5 5) Identical light bulbs A, B and C are connected in series to a battery. Which bulb will be the brightest? They will all be equally bright. Bulb B will be the brightest. Bulb A will be the brightest. Bulb C will be the brightest. Your score is Restart quiz