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P4.4 - Fields

Electric and Magnetic Fields - OCR A2 Physics

QuestionAnswer
What does the force experienced by two charged particles depend on? The charges on the objects, the distance between them.
What type of relationship is Coulomb's law? An inverse square relationship between force and distance.
How is static electricity built up? When two objects a rubbed together, one literally 'scrapes' electrons off of the other, leaving it positively charged, and making itself negatively charged.
Define electric field: A region in which there are forces acting on charges.
Define electric field strength: The force exerted by an electric field on one coulomb.
Define magnetic field: An area in which magnetic materials or charged particles experience a force.
What do the fingers on Fleming's left hand rule stand for? Thum = force, 1st finger = field and 2nd finger = current.
What is 1 Tesla? The magnetic field strength which causes a force of 1N on a wire with length 1m in the field carrying 1A.
What is the Right hand grip rule? Thumb = current, curl of fingers = direction of field.
What is a Mass Spectrometer? A devices used to discover what elements are present in a given sample.
How does a mass spectrometer work? The gas is ionised. The ions are accelerated. A magnetic field is applied perpendicular to the motion of the ions. The lighter the particle is, the smaller the curvature when it drops due to the field.
Created by: Sparksy
 

 



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