The car body has an flows through a opposite charge so component in one second. paint drops that would miss are attracted to it. (a) 15 C 3.5 C (a) When you unroll cling 0.28 A film, negative charges 2.5 A (electrons) from one layer 5 s get pulled across to the 900 s other. This creates patches of 1950 C positive and negative charges. 0.38 A The plastic bowl is an electrical insulator. 210 s The negative charges can flow through the Alternating current conducting bowl constantly changes and away from the cling direction. film. Direct current only flows in one direction from – (a) Air and dust particles negative to positive. enter the precipitator through a negatively (a) Alternating current charged metal grid. Direct current The dust particles can be charged but the air (a) (i) 6V (ii) 50 Hz particles can’t. (i) 3 V (ii) 100 Hz Dust particles are then attracted to positively charged plates. This only leaves air particles leaving the precipitator. Fossil fuel power stations can clean their emissions so less smoke is released in to the atmosphere. (a) Y (b) Z (c) X Series Circuits (p21 22) Electrical Current (p18 19) Charges in Electric Fields (p20) – – (a) I1 = 0.4 A, I2 = 0.4 A Electrical current is a flow I1 = 6.5 A, I2 = 6.5 A of electrons. It is the amount of charge that
The car body has an opposite charge so paint drops that would miss are attracted to it. (a) When you unroll cling film, negative charges (electrons) from one layer get pulled across to the other. This creates patches of positive and negative charges. The plastic bowl is an electrical insulator. The negative charges can flow through the conducting bowl and away from the cling film. (a) Air and dust particles enter the precipitator through a negatively charged metal grid. The dust particles can be charged but the air particles can’t. Dust particles are then attracted to positively charged plates. This only leaves air particles leaving the precipitator. Fossil fuel power stations can clean their emissions so less smoke is released in to the atmosphere. Electrical Current (p18 – 19) Electrical current is a flow of electrons. It is the amount of charge that flows through a component in one second. (a) 15 C 3.5 C 0.28 A 2.5 A 5 s 900 s 1950 C 0.38 A 210 s Alternating current constantly changes direction. Direct current only flows in one direction – from negative to positive. (a) Alternating current Direct current (a) (i) 6V (ii) 50 Hz (i) 3 V (ii) 100 Hz Charges in Electric Fields (p20) (a) Y (b) Z (c) X Series Circuits (p21 – 22) (a) I1 = 0.4 A, I2 = 0.4 A I1 = 6.5 A, I2 = 6.5 A
Electricity-and-Energy-Problem-Booklet-sbu8z8.docx