SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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20
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50
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100
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200
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Detailed explanation-1: -In the UK, alternating current oscillates 50 times every second, meaning our frequency is 50 hertz (50Hz). All UK appliances and electrical equipment are designed to work at 50Hz.
Detailed explanation-2: -At the time, AEG had a virtual monopoly and their standard spread to the rest of Europe. After observing flicker of lamps operated by the 40 Hz power transmitted by the Lauffen-Frankfurt link in 1891, AEG raised their standard frequency to 50 Hz in 1891.
Detailed explanation-3: -The mains supply in the UK is an alternating current (ac) voltage at a frequency of 50 hertz (Hz) and a voltage of 230 volts (V). The power input for households is ac as the National Grid can only use ac input. This means that the direction of the current and voltage changes 100 times per second.