The net resistance of a voltmeter should be large to ensure that
  • A
    It does not get overheated
  • B
    It does not draw excessive current
  • C
    It can measure large potential difference
  • D
    It does not appreciably change the potential difference to be measured
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
    Two identical cells, when connected either in parallel or in series gives same current in an external resistance $5\,\Omega$. The internal resistance of each cell will be $.............\,\Omega$.
    View Solution
  • 2
    A current of $2\,A$ flows through a wire of crosssectional area $25.0\,mm ^2$. The number of free electrons in a cubic meter are $2.0 \times 10^{28}$. The drift velocity of the electrons is $...............\times 10^{-6}\,ms ^{-1}$ (given, charge on electron $=1.6 \times 10^{-19}\,C$ )
    View Solution
  • 3
    A copper wire of diameter $1.02\, mm$ carries a current of $1.7\, amp$. Find the drift  velocity $(v_d)$ of electrons in the wire. Given $n$, number density of electrons in copper $= 8.5 \times 10^{27} /m^3$....................... $mm/sec$
    View Solution
  • 4
    Match the List $I$ with the List $II$ from the combination shown. In the left side (List $I$) there are four different conditions and in the right side (List $II$), there are ratios of heat produced in each resistance for each condition :
    List $I$ List $II$ 
    $(I)$ Two wires of same resistance are connected in series and same current is passed through them $(A)$ $1:2$
    $(II)$ Two wires of resistance $R$ and $2R$ $ohm$ are connected in series and same $P . D .$ is applied across them $(B)$ $4:1$
    $(III)$ Two wires of same resistance are connected in parallel and same current is flowing through them $(C)$ $1:1$
    $(IV)$ Two wires of resistances in the ratio $1:  2$ are connected in parallel and same $P . D .$ is applied across the $(D)$ $2:1$
    View Solution
  • 5
    For the circuits shown in figures $I$ and $II$, the voltmeter reading would be
    View Solution
  • 6
    During an experiment with a metre bridge, the galvanometer shows a null point when the joceky is pressed at $40.0 \ cm$ using a standard resistance of $90 \ \Omega$, as shown in the figure. The least count of the scale used in the meter bridge is $1 \ mm$. The unknown resistance is:
    View Solution
  • 7
    Four identical cells of $EMF$ $E$ and internal resistance $r$ are connected as shown in figure, find terminal voltage across any one cell
    View Solution
  • 8
    Two identical cells each of emf $1.5\,V$ are connected in series across a $10\,\Omega$ resistance. An ideal voltmeter connected across $10\,\Omega$ resistance reads $1.5\,V$. The internal resistance of each cell is $......\Omega$.
    View Solution
  • 9
    The current in a conductor is expressed as $I=3 t^2+4 t^3$, where $I$ is in Ampere and $t$ is in second. The amount of electric charge that flows through a section of the conductor during $t=1$ s to $t=2 \mathrm{~s}$ is_______ C.
    View Solution
  • 10
    The two bulbs as in the above question are connected in series to a $200\, volt$ line. Then
    View Solution