In a large building, there are $15$ bulbs of $40\ W$, $5$ bulbs of $100\ W, 5$ fans of $80\ W$ and $1$ heater of $1\ kW$. The voltage of electric mains is $220\ V$. The minimum capacity of the main fuse of the building will be ................ $A$
  • A$10$ 
  • B$12$ 
  • C$14 $
  • D$8$ 
JEE MAIN 2014, 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
    Two square metal plates $A$ and $B$ are of the same thickness and material. The side of $B$ is twice that of $A$. These are connected as shown in series. If the resistances of $A$ and $B$ are denoted by $R_A$ and $R_B,$ then $(R_A/R_B)$ is
    View Solution
  • 2
    By what percentage will the illumination of the lamp decrease if the current drops by $20 \%$ ?
    View Solution
  • 3
    Find the charge in steady state of the capacitor. (in $nC)$
    View Solution
  • 4
    In the circuit shown $P \ne R$, the reading of the galvanometer is same with switch $S$ open or closed. Then
    View Solution
  • 5
    Two bulbs, one of $200 \,W$ and the other of $100 \,W$ are connected in series with a $100 \,V$ battery which has no internal resistance. Then,
    View Solution
  • 6
    In an experiment of potentiometer for measuring the internal resistance of primary cell a balancing length $\ell $ is obtained on the potentiometer wire when the cell is open circuit. Now the cell is short circuited by a resistance $R$. If $R$ is to be equal to the internal resistance of the cell the balancing length on the potentiometer wire will be
    View Solution
  • 7
    The resistances of the four arms $P, Q, R$ and $S$ in a Wheatstone's bridge are $10\,ohm$, $30\,ohm$, $30\,ohm$ and $90\,ohm$, respectively. The e.m.f. and internal resistance of the cell are $7\,volt$ and $5\,ohm$ respectively. If the galvanometer resistance is $50\,ohm$, the current drawn from the cell will be ............... $A$
    View Solution
  • 8
    A $60\, watt$ bulb operates on $220\,V$ supply. The current flowing through the bulb is
    View Solution
  • 9
    Given below are two statements

    Statement $I:$ The equivalent resistance of resistors in a series combination is smaller than least resistance used in the combination.

    Statement $II$ : The resistivity of the material is independent of temperature.

    In the light of the above statements, choose the correct answer from the options given below

    View Solution
  • 10
    If the resistance of a conductor is $5\,\Omega\,\,$ at $\,50\,^oC$ and $7\, \Omega\,$ at $\,100\,^oC$ then the mean temperature coefficient of resistance of the material is ............... $^oC$
    View Solution