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P4.4 - Fields
Electric and Magnetic Fields - OCR A2 Physics
| Question | Answer |
|---|---|
| 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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