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  1. A radiotransmitter radiates 1 kW power at a wavelength 198.6 m. How many photons
  2. A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
  3. The work function for metals A,B abd C are respectively 1.92 eV,2.0 eV and 5 eV.
  4. An inclined plane makes an angle of 30° with the horizontal.A solid sphere
  5. A transformer having efficiency of 90% is working on 200 V and 3kW power supply