Aptitude is the ability
To acquire knowledge or perform
To possess the interest to do a task
To manipulate objects
To succeed in a test

What is Rorschach's projective test designed to measure?
Unconscious intentions
Dreams
Conscious desires
Brain size

Pure Silicon semiconductor at 500K has equal electrons and holes (1.5 × 10¹⁶ m^-3). Doping by Indium increases n_h to 4.5 × 10²² m^-3. Calculate the type and electron concentration of doped semiconductor.

Why the valence band in semiconductors is partially empty and the conduction band is partially filled at room temperature?

In an intrinsic semiconductor, the number of conduction electrons is 7 × 10¹⁹ m³. Find the total number of current carriers in the same semiconductor of size 1 cm × 1 cm × 1 mm.

The energy gap of silicon is 1.14 eV. What is the maximum wavelength at which silicon will begin absorbing energy?

The energy of a photon of sodium light (λ = 589 nm) equals the bandgap of semiconducting material. Find:

The minimum energy E required to create a hole-electron pair. (5890 A⁰)

The value of E/kT at a temperature of 300 K. (81)

A P-type semiconductor has acceptor level 57 meV above the valence band. What is the maximum wavelength of light required to create a hole? (217100 A⁰)

Least paramagnetic property is shown by
Fe
Mn
Ni
Cu

Which of the following gives a red precipitate with AgNO₃ ?

KI

K₂CrO₄

NaBr

NaNO₃ .

How many d electrons are in present Cr²⁺ ion
4
5
6
3