Electric and Magnetic Fields - OCR A2 Physics
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| What does the force experienced by two charged particles depend on? | The charges on the objects, the distance between them.
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| What type of relationship is Coulomb's law? | An inverse square relationship between force and distance.
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| 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.
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| Define electric field: | A region in which there are forces acting on charges.
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| Define electric field strength: | The force exerted by an electric field on one coulomb.
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| Define magnetic field: | An area in which magnetic materials or charged particles experience a force.
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| What do the fingers on Fleming's left hand rule stand for? | Thum = force, 1st finger = field and 2nd finger = current.
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| 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.
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| What is the Right hand grip rule? | Thumb = current, curl of fingers = direction of field.
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| What is a Mass Spectrometer? | A devices used to discover what elements are present in a given sample.
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| 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.
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