Download App

Electronics — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
Question

Choose the correct statement

(a) When we heat a semiconductor its resistance increases

(b) When we heat a semiconductor its resistance decreases

(c) When we cool a semiconductor to 0 K then it becomes super conductor

(d) Resistance of a semiconductor is independent of temperature
✓

Answer

(b) When we heat a semiconductor its resistance decrease

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Electronics→Electronics — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

_________ Charge is produced by friction.
→

The attenuation in optical fibre is mainly due to

(a) Absorption

(b) Scattering

(c) Neither absorption nor scattering

(d) Both (a) and (b)
→
A wave moving in a gas,
  1. Must be longitudinal
  2. May be longitudinal
  3. Must be transverse
  4. May be transverse
→

Find the equivalent resistance across AB

(a) 1 W

(b) 2 W

(c) 3 W

(d) 4 W
→
The state of charge inside a closed surface is changed in such a way that total charge remains constant, the flow of electric flux from the closed surface:
→
The energy contained in a small volume through which an electromagnetic wave is passing oscillates with:
→
The focal length of a lens $(n=1.5)$ in air is 20 cm. Its focal length in medium of refractive index 1.5 is :
→
The magnitude of the electric field is given by the change in magnitude of potential per unit displacement _____ to the equipotential surface at the point.
→

Hubble showed that the universe as a whole is expanding and the distant stars are receding from us. The spectral line from a star, when compared with the corresponding line from an source will then show

(a) A shift in frequency towards the red end

(b) A shift in frequency towards the violet end

(c) No shift in frequency at all

(d) A shift in frequency towards the violet end as well as a decrease in intensity

→

Potential gradient is defined as

(a) Fall of potential per unit length of the wire

(b) Fall of potential per unit area of the wire

(b) Fall of potential per unit area of the wire

(d) Potential at any one end of the wire
→