Copper and silicon is cooled from $300\; K$ to $60\; K$, the specific resistance
  • A
    decrease in copper but increase in silicon
  • B
    increase in copper but decrease in silicon
  • C
    increase in both
  • D
    decrease in both.
AIPMT 2001, Easy
art

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Similar Questions

  • 1
    In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across $52\ cm$ of the potentiometer wire. If the cell is shunted by a resistance of $ 5\,\Omega$, a balance is found when the cell is connected across $40\ cm$ of the wire. Find the internal resistance of the cell ........... $\Omega$
    View Solution
  • 2
    Calculate the net resistance of the circuit between $A$ and $B$
    View Solution
  • 3
    In the figure a carbon resistor has bands of different colours on its body as mentioned in the figure. The value of the resistance is ................. $k \Omega$
    View Solution
  • 4
    The battery in the diagram is to be charged by the generator $G$. The generator has a terminal voltage of $120$ $\mathrm{volts}$ when the charging current is $10$ $\mathrm{amperes}.$ The battery has an $\mathrm{emf}$ of $100$ $\mathrm{volts}$ and an internal resistance of $1$ $\mathrm{ohm}.$ In order to charge the battery at $10$ $\mathrm{amperes}$ charging current, the resistance $R$ should be set at ................ $\Omega$
    View Solution
  • 5
    In a metre-bridge when a resistance in the left gap is $2\  \Omega$ and unknown resistance in the right gap, the balance length is found to be $40\  \mathrm{~cm}$. On shunting the unknown resistance with $2\  \Omega$, the balance length changes by :
    View Solution
  • 6
    The magnitude of $i$ in ampere unit is
    View Solution
  • 7
    First, a set of ${n}$ equal resistors of $10\; \Omega$ each are connected in series to a battery of emf $20\; {V}$ and internal resistance $10\; \Omega .$ A current $I$ is observed to flow. Then, the $n$ resistors are connected in parallel to the same battery. It is observed that the current is increased $20$ times, then the value of $n$ is .... .
    View Solution
  • 8
    Two batteries with e.m.f $12\ V$ and $13\ V$ are connected in parallel across a load resistor of $10\,\Omega$ . The internal resistances of the two batteries are $1\,\Omega$ and $2\,\Omega$ respectively. The voltage across the load lies between
    View Solution
  • 9
    An electric bulb is designed to draw power $P_0$ at voltage $V_0$. If the voltage is $V$ it draws a power $P$. Then
    View Solution
  • 10
    If the length of the filament of a heater is reduced by $10\%$, the power of the heater will
    View Solution