A $50 \,W$ bulb connected in series with a heater coil is put to an $AC$ mains. Now the bulb is replaced by a $100 \,W$ bulb. The heater output will ...........
Easy
Download our app for free and get started
(c)
$P_1=\left(\frac{E}{R+R^{\prime}}\right)^2 R^{\prime}$
$P_2=\frac{E R^{\prime}}{\left(\frac{R}{2}+R^{\prime}\right)^2}$
$P_2 > P_1$
Download our appand 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
- 1Three copper wires of lengths and cross sectional areas are $(l,\,A),\,(2l,\,A/2)$ and $(l/2,\, 2A)$ . Resistance is minimum inView Solution
- 2In the circuit shown below, the resistances are given (in $\Omega$ ) and the battery is assumed ideal with emf equal to $3.0 \,V$. The resistor that dissipates the most power isView Solution
- 3Two wires $A$ and $B $ of same material and same mass have radius $2r$ and $r$ . If resistance of wire $A$ is $34\,\Omega $, then resistance of $B$ will be ............ $\Omega$View Solution
- 4The resistor of resistance '$R$' is connected to $25\, V$ supply and heat produced in it is $25\, J/sec$. The value of $R$ is .......... $\Omega $View Solution
- 5For ensuring dissipation of same energy in all three resistors $({R_1},\,{R_2},\,{R_3})$ connected as shown in figure, their values must be related asView Solution
- 6In the circuit, the reading of the ammeter is ................. $A$ (assume internal resistance of the battery be zero)View Solution
- 7The equivalent resistance between $A$ and $B$ of the network shown in figureView Solution
- 8A $220\, volt$ and $800\, watt$ electric kettle and three $220\, volt$ and $100\, watt$ bulbs are connected in parallel. On connecting this combination with $220\, volt$ electric supply, the total current will be ................ $ampere$View Solution
- 9In the experiment of calibration of voltmeter, a standard cell of $e.m.f\,\,1.1\,volt$ is balanced against $440\,cm$ of potential wire. The potential difference across the ends of resistance is found to balance against $220\,cm$ of the wire. The corresponding reading of voltmeter is $0.5\,volt.$ The error in the reading of volmeter will be .................. $volt$View Solution
- 10The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire is $31.4 \,cm$. The diameter of wire is measured as $2.4 \,cm$. The resistivity of the given wire is measured as $x \times 10^{-3} \,\Omega cm$. The value of $x$ is_______ [Take $\pi=3.14]$View Solution
