Two light bulbs in the circuit have rating $A\,[24\ V, 48\,W]$ and $B\,[24\ V, 36\,W]$ as shown.
  • AWhen switch is closed bulb $A$ delivers $24\ watt$  $\&$  $B$ delivers $18\ watt$ .
  • BWhen switch is open $A$ delivers $9\ watt$  $\&$  $B$ delivers $12\ watt$ approximately.
  • CWhen switch is open $A$ delivers $24\ watt$  $\&$  $B$ delivers $18\ watt$ approximately.
  • DWhen switch is open $'A'$ delivers $6\ watt$ and $B$ delivers $9\ watt$ approximately.
Medium
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
    If two electric bulbs have $40\,W$ and $60\,W$ rating at $220\,V$, then the ratio of their resistances will be
    View Solution
  • 2
    Two wires of same length and thickness having specific resistances $6\, \Omega \,cm$ and $3 \,\Omega\, cm$ respectively are connected in parallel. The effective resistivity is $\rho\, \Omega \,cm$. The value of $\rho$ to the nearest integer, is ..... .
    View Solution
  • 3
    If ${V_{AB}} = 4\,V$ in the given figure, then resistance $X$ will be .............. $\Omega$
    View Solution
  • 4
    The resistance in the two arms of a meter bridge are $5\,\Omega $ and $R\,\Omega $, respectively. When the resistance $R$ is shunted with an equal resistance, the new balance point is at $1.6\, l_1$. The resistance $‘R’$ is ................. $\Omega$
    View Solution
  • 5
    Assertion : Long distance power transmission is done at high voltage.

    Reason : At high voltage supply power losses are less.

    View Solution
  • 6
    In the following circuit diagram, $E = 4\,V, r = 1\,\Omega$ and $R = 45\, \Omega$, then  reading of the ammeter $A$ will be
    View Solution
  • 7
    Assertion : Bending a wire does not effect electrical resistance.

    Reason : Resistance of wire is proportional ot resistivity of material.

    View Solution
  • 8
    As the switch $S$ is closed in the circuit shown in figure, current passed through it is .................. $A$
    View Solution
  • 9
    An aluminium wire is stretched to make its length, $0.4 \,\%$ larger. Then percentage change in resistance is $.....\,\%$
    View Solution
  • 10
    Electroplating does not help in
    View Solution