In the transistor schematic symbol, the arrow_______________?

A. Is located on the emitter
B. Is located on the base
C. Is locate on the collector
D. Points form north to south

The semiconductor diode can be used as a rectifier because _______________?

A. It has low resistance to the current flow when forward biased & high resistance when reverse biased.
B. It has low resistance to the current flow when forward biased.
C. It has high resistance to the current flow when reverse biased
D. Its conductivity increases with rise of temperature.

The device or circuit used for conversion of A.C. into D.C. is called_______________?

A. An amplifier.
B. A rectifier
C. Filtering circuit
D. Converter.

In n-p-n transistor, p works as______________?

A. Collector
B. Emitter
C. Base
D. Any of above

Identify the correct statement about minority carriers_____________?

A. Holes in n-type and free electrons in p-type
B. Holes in n-type and p-type
C. Free electrons in n-type and holes in p-type
D. Free electrons in n-type and p-type

The velocity of an oscillating charge as it moves to and fro along a wire is always_____________?

A. Constant
B. Zero
C. Changing
D. Infinite

The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

A. 6.2 x 10-10m
B. 9.1 x 10-18m
C. 3.11 x 10-10m
D. 4 x 10-10m

Maximum frequency in the spectrum from X-ray tube is directly proportional to the______________?

A. Number of incident electron i.e. filament current
B. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated
C. The soft target which can easily emit electrons
D. All of above are correct

X-rays are diffracted by a crystal but not by a diffraction grating because_____________?

A. The ions in a crystal are well arranged
B. The lines in a diffraction grating cannot reflect x-rays.
C. The penetration power of x-rays is high in a diffraction grating
D. The wavelengths of x-rays are of the same order of magnitude as the separation between atoms in a crystal

UV radiation can be produced by______________?

A. Heating the filament
B. Electron excitation in the gas
C. Ionization of atoms
D. All the above