Current The Flow Current Flow Bill Nye on

Current: The Flow

Current = Flow Bill Nye on Current (@ 9: 24) • https: //www. youtube. com/watch? v=SYac. U aukaxg

Analogy

Current= Amps • Current is measured in units called AMPERES (A) • Current is represented by the letter (I) • Current (I)= the rate at which the electric charges move past a given point in a circuit

Charge (Q) and Current • 1 Unit of charge (Q) = Coulomb (C) • 1 coulomb= 6. 25 x 1018 electrons (6, 250, 000, 000 electrons) • Therefore Current (I)= Q (charge moving past a point) t (second) • A current of 1. 0 A means that 1. 0 C (or 6. 25 x 1018 electrons) of charge is moving past a point in the circuit every second

Current Symbol Unit Calculation (Quantity) Coulomb (C) 6. 25 x 1018 electrons Charge Q Current I Ampere (A) Time t Seconds I=Q t

Current- How Strong is It? Current Biological Effect 0. 001 A Threshold for feeling (tingling) Voluntary let-go of circuit impossible Onset of Muscular Contractions (spasms) Ventricular Fibrillation (heart spasms) or Cardiac Arrest 0. 01 A-0. 02 A 0. 025 A 0. 05 A-0. 2 A

Ammeters • An instrument called an ammeter measures current • Connected within a circuit to count how many electrons are moving through it every second

Assessment • Read pages 324 -328 in book • Do questions 1 -3 on page 329