If the earth receives 2 cal/min-cm2 solar energy from sun, calculate the amplitudes of electric and magnetic field of radiation?

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If the earth receives 2 cal/min-cm2 solar energy from sun, calculate the amplitudes of electric and magnetic field of radiation?

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Lead has a superconducting transition temperature of 7.26 K. If initial field at 0 K is 50 × 103 Am−1, calculate the critical field at 6 K. If the lead is in the form of a wire with diameter 1 mm, then calculate the critical current it can carry.

Calculate the probability of an electron occupying an energy level 0.02 eV above the Fermi level at 200 K and 400 K in a material.

Find the temperature at which there is 1.0 % probability that a state with energy 0.5 eV above Fermi energy will be occupied.

The critical field for niobium is 1 × 105 A/m at 8 K and 2 × 105 A/m at 0 K. Calculate the transition temperature of the element.

Determine the transition temperature and critical field at 4.2 K for a given specimen of a superconductor if the critical fields are 1.41 × 105 and 4.205 × 105 A/m at 14.1 K and 12.9 K, respectively.