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  1. A black body at a temperature of 227⁰C radiates heat at a rate of 20 cal m⁻²s⁻¹.
  2. The flux linked with a circuit is given by φ=t³+3t-7. The graph between time
  3. The electric field in a certain region is acting radially outward and is given by E=Ar.
  4. When a metallic surface is illuminated with radiation of wavelength λ,
  5. The dimensional formula for Boltzmann’s constant is