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onegirl
A transformer has 175 turnings on the primary coil and 3000 turnings on the secondary coil. If the output voltage is 4000 V, what is the input voltage?
@ParthKohli can you help please?
ok how about this one ? What is the energy of an X-ray photon of wavelength 2.2 x 10^18 Hz?
i hope ur wrong with ur question, is it freq or wavelength????
sry i forgot the unit, its joule's or m^2kgHzs^-1