Atoms — Physics STD 12 Science — Question

Resistivity of semiconductor is __________ increasing the temperature.

When n-type semiconductor is heated, numbers of electrons and holes are _________ increases.

The radius of curvature of a concave mirror is 24 cm. The value of its focal length will be __________ cm .

If a dielectric material is placed between two positive charges placed in air, the repulsion force between them will be __________.

_________ are strongly magnetic in the magnetisation field in the direction of field.

If de-Broglie wavelength of an electron and photon are same, then kinetic energy of electron is more than the kinetic energy of ________ .

Frequency of alternating potential V= 311 sin 314 t is __________.

__________ produces magnetic field in the same way as conduction current.

When the plane of a current carrying coil is suspended in a radial magnetic field is perpendicular to the magnetic field, the torque working on it is ____________

Lenz's law follow law of conservation of ___________.