Current and Charge (Random questions) 0.0 / 5 PhysicsElectric fieldsASAQA Created by: Kelsie_Em182Created on: 30-09-14 17:34 What is the unit of charge? Coulomb 1 of 21 In a fluid or liquid, the charge carriers are... positive and negative ions 2 of 21 What do you apply to insulators to add or removes charges? Friction 3 of 21 What is the definition of current? Current is the rate of flow of charge 4 of 21 Current of 1A is equal to... 1C passing a single point in 1s 5 of 21 What is the equation for charge? Charge = Current x Time (Q = I x t) 6 of 21 Which way do the electrons flow in conventional current? Positive to Negative 7 of 21 How do electrons move? (Not in conventional current) Negative to Positive 8 of 21 What is the definition of potential difference? Potential difference is the work done per unit of charge 9 of 21 What is the equation for potential difference? Potential difference = work done / charge (p.d. = wd / charge) 10 of 21 What is the definition of E.M.F? (Electro Motive Force) The electrical energy produce per unit charge passing a source 11 of 21 What is the equation for E.M.F? Work done = Charge x E.M.F 12 of 21 What is the equation for power? Power = Work done / Time (P = wd / t) 13 of 21 What is the equation for power in regards to E.M.F? Power = Current x Voltage (P = I x V) 14 of 21 What is the charge of an electron? 1.6 x 10^-19 15 of 21 What is the length of one micrometre? 1 x 10^-6 16 of 21 What is the equation for resistance? Resistance = Voltage / Current (R = V / I) 17 of 21 What are the units of resistance? Ohms 18 of 21 What is the equation for resistance in a wire? Resistance = Resistivty x length / The wire's cross-sectional area (R = pl / A) 19 of 21 Free electrons are only found in... metals 20 of 21 What are the units of current? Amperes 21 of 21

## Comments

No comments have yet been made