At which temperature superconductivity can be of tremendous economic interest saving billions of rupees?

Which of the following statements is correct? As the temperature increases,

At absolute zero temperature, the electric resistance in semiconductor is-

Which of the following elements is a semiconductor?

Which one of the following metals is used as semiconductor in transistors?

In photoelectric effect, photoelectric Einstein's equation is E = hν − φ. I. φ represents work function metal. II. The electrons will not be emitted if hν < φ. III. The increasing intensity of fallin…