Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

A conducting wire is dropped along east-west direction, then(a) No emf is induced(b) No induced current flows(c) Induced current flows from west to east(d) Induced current flows from east to west

Diffusion current in a p-n junction is greater than the drift current in magnitude:

Assertion  :   There is no atmosphere on moon
Reason      : Escape velocity at the surface of moon is low.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.

A conductor with a positive charge (a) Is always at +ve  potential(b) Is always at zero potential(c) Is always at negative potential(d) May be at +ve, zero or -ve potential

The displacement current was first populated by.

Filter circuit:

Change in number of magnetic field lines induces.

The maximum wavelength of radiation that can produce photoelectric effect in a certain metal is 200 nm. The maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm will be(a) 12.4 eV(b) 6.2 eV(c) 100 eV(d) 200 eV