MCQ
Assertion : Semiconductors do not Obey's Ohm's law.
Reason : Current is determined by the rate of flow of charge carriers.
  • 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.
  • If assertion is false but reason is true.

Answer

Correct option: D.
If assertion is false but reason is true.
 If assertion is false but reason is true.

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

Similar questions

Half lives of two radioactive nuclei $A$ and $B$ are $10\, minutes$ and $20\, minutes$, respectively. If, initially a sample has equal number of nuclei, then after $60$ $minutes$ , the ratio of decayed numbers of nuclei $A$ and $B$ will be
A mark at the bottom of a liquid appears to rise by 0.1 m. The depth of the liquid is 1 m. The refractive index of the liquid is
The charge on electron was discovered by
Two long parallel horizontal rails, a distance $l$ apart and each has a resistance $\lambda$ per  unit length are joined at one end by a resistance $R$. A perfectly conducting rod $MN$ of mass  $m$ is free to slide along the rails without friction. There is a uniform magnetic field of  induction $B$ normal to the plane of paper and directed into the paper. A variable force $F$ is applied to the rod $MN$ such that, as the rod moves, a constant current $i$ flows through $P$. The applied force $F$ as function of distance $x$ of the rod from $R$ is

 

A charged particle $q$ is placed at the centre $O$ of cube of length $L$ $(A\,B\,C\,D\,E\,F\,G\,H)$. Another same charge $q$ is placed at a distance $L$ from $O$.Then the electric flux through $BGFC$ is
The focal length of a concave mirror is $f$. An object is placed at a distance $x$ from the focus. The magnification is
Half-life is measured by
The electric field at a point on equatorial line of a dipole and direction of the dipole moment:
When diameter of the aperture of the objective of an astronomical telescope is increased, its
The potential difference across $8\, ohm$ resistance is $48\, volt$ as shown in the figure. The value of potential difference across $X$ and $Y$ points will be ............. $volt$