MCQ
A semiconductor is cooled from ${T_1}K$ to ${T_2}K.$ Its resistance
  • A
    Will decrease
  • Will increase
  • C
    Will first decrease and then increase
  • D
    Will not change

Answer

Correct option: B.
Will increase
b
(b)Resistance of semiconductor $ \propto \frac{1}{{{\rm{Temperature}}}}$

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

Four capacitors are connected as shown in the figure. Their capacities are indicated in the figure. The effective capacitance between points $x$ and $y$ is (in $\mu F$)
The stopping potential for the photo electrons emitted from a metal surface of work function $1.7\, eV$ is $10.4\, V$. Identify the energy levels corresponding to the transitions in hydrogen atom which will result in emission of wavelength equal to that of incident radiation for the above photoelectric effect
A potentiometer circuit is set up as shown. The potential gradient, across the potentiometer wire, is $k$ $volt/cm$ and the ammeter, present in the circuit, reads $1.0\,\, A$ when two way key is switched off. The balance points, when the key between the terminals $(i)$  $1$ and $2$  $(ii)$ $1$ and $3,$ is plugged in, are found to be at lengths $l_1$ and $l_2$ respectively. The magnitudes, of the resistors $R$ and $X,$ in $ohms$, are then, equal, respectively, to 
On a smooth inclined plane, a body of mass $M$ is attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has force constant $K$, the period of oscillation of the body (assuming the springs as massless) is
A bar magnet is cut into two equal parts then which of the following quantity may change

$(a)$ Intensity of magnetization

$(b)$ Pole strength

$(c)$ Magnetic moment

Two identical short bar magnets, each having magnetic moment $M,$ are placed a distance of $2d $ apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is
A rigid massless road of length $3l$ has tow masses attached at each end as shown in the figure. The rod is pivoted at point $P$ on the horizontal axis (see figure). When released from initial horizontal position, its instantaneous angular acceleration will be
The energy of a particle executing simple harmonic motion is given by $E = Ax^2 + Bv^2$, where $x$ is the displacement from mean position $x = 0$ and $v$ is the velocity of the particle at $x$ then choose the incorrect statement
An ice cream has a marked value of $700 \,kcal$. How many kilowatt- hour of energy will it deliver to the body as it is digested ............ $kWh$
Assertion : Voltmeter is connected in parallel with the circuit.

Reason : Resistance of a voltmeter is very large.