The conduction band of a solid is partially filled at 0 K.will it be a conductor, a semiconductor or an insulator?

In semiconductor the valence band at 0 K is

A loop is formed by two parallel conductors connected by a solenoid with inductance L=2H and a conducting rod of mass m=80g, which can freely (without fricition) slide over the conductors. The conductors are located in a horizontal plane in a uniform vertical magnetic field with induction B=4T. The distance between the conductors is equal to l=4cm. At the moment t=0 the rod is imparted an initial velocity v_(0)=2 cm//s directed to the right. Find the amplitude (in cm) for the oscillations of conducting rod, if the electric resistance of the loop is negligible.

What is the energy gap between valence band 'and conduction band in crystal of insulators ?

One mole of a monoatomic ideal gas occupies two champers of a cylinder partioned by means of a movable pision. The walls of the cylinder as well as the piston are thermal insulators. Initially equal amounts of gas fill both the chambers at ( P_(0), V_(0), T_(0) ). A coil is burnt in the left chamber which absorbs heat and expands , pushing the piston to the right . The gas on the right chamber is compressed until to pressure becomes 32 P_(0) . The work done on the gas in the right chamber is

One mole of a monoatomic ideal gas occupies two champers of a cylinder partioned by means of a movable pision. The walls of the cylinder as well as the piston are thermal insulators. Initially equal amounts of gas fill both the chambers at ( P_(0), V_(0), T_(0) ). A coil is burnt in the left chamber which absorbs heat and expands , pushing the piston to the right . The gas on the right chamber is compressed until to pressure becomes 32 P_(0) . The final volume of left chamber is

One mole of a monoatomic ideal gas occupies two champers of a cylinder partioned by means of a movable pision. The walls of the cylinder as well as the piston are thermal insulators. Initially equal amounts of gas fill both the chambers at ( P_(0), V_(0), T_(0) ). A coil is burnt in the left chamber which absorbs heat and expands , pushing the piston to the right . The gas on the right chamber is compressed until to pressure becomes 32 P_(0) . The work done on the gas in the right chamber is

The electrical conductivity of a semiconductor of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm, is incident on it. The band gap in (eV) for the semi conductor is ……

Name the charge carriers in the following at room temperature : (i) Conductor (ii) Intrinsic semiconductor (iii) Insulator.