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level: Monitoring and measuring a.c.

Questions and Answers List

level questions: Monitoring and measuring a.c.

QuestionAnswer
what is the formula for frequencyf=1/T f is frequency in Hz T is period in seconds
what are the two types of currentdirect current alternating current
describe direct currentthe electrons flow in one direction through a conductor
describe alternating currentcurrent that changes direction and instantaneous value with time
give examples of sources direct current is produced bychemical cells batteries
give examples of sources alternating current is produced bymains electricity
what will a graph of direct current against time look like?...
what will a graph of alternating current against time look like...
what is meant by peak currentthe maximum value of current
what is meant by peak voltagemaximum value for potential difference
what is an r.m.s value?root means square the alternating current equivalent of a direct current supply
what is the formula for peak/rms currentIrms=Ipeak/√2
what is the formula for peak/rms voltageVrms=Vpeak/√2
what does the time base setting on an oscilloscope tell usthe number of milliseconds it takes the trace to cross each box from left to right
what does voltage gain setting on an oscilloscope tell usthe number of volts each box represents in the vertical direction
what is the formula for frequencyf=1/T f is frequency in Hz T is period in seconds