Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct
A
In series fine wire liberates more energy while in parallel thick wire will liberate more energy
B
In series fine wire liberates less energy while in parallel thick wire will liberate more energy
C
Both will liberate equally
D
In series the thick wire will liberate more while in parallel it will liberate less energy
Easy
Download our app for free and get started
A
In series fine wire liberates more energy while in parallel thick wire will liberate more energy
a (a) In series, is same), i.e. in series Fine wire (high $R$) liberates more energy.
In parallel, $P \propto \frac{1}{R}(V$is same) i.e. thick wire (less $R$) liberates more energy.
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.*
Resistance of a wire at $0^{\circ} \mathrm{C}, 100^{\circ} \mathrm{C}$ and $t^{\circ} \mathrm{C}$ is found to be $10 \Omega, 10.2 \Omega$ and $10.95 \Omega$ respectively. The temperature $t$ in Kelvin scale is $\qquad$
The resistance of a conductor at $15^{\circ} {C}$ is $16\, \Omega$ and at $100\, {C}$ is $20\, \Omega$. What will be the temperature coefficient of resistance of the conductor?
A wire of length $10 \mathrm{~cm}$ and radius $\sqrt{7} \times 10^{-4} \mathrm{~m}$ connected across the right gap of a meter bridge. When a resistance of $4.5 \ \Omega$ is connected on the left gap by using a resistance box, the balance length is found to be at $60 \mathrm{~cm}$ from the left end. If the resistivity of the wire is $\mathrm{R} \times 10^{-7} \Omega \mathrm{m}$, then value of $\mathrm{R}$ is :
A new flashlight cell of $e.m.f.$ $1.5\, volts$ gives a current of $15\, amps$, when connected directly to an ammeter of resistance $0.04\,\Omega $. The internal resistance of cell is ........... $\Omega$
When the resistance $R$ (indicated in the figure below) is changed from $1 \,k \Omega$. to $10 \,k \Omega$, the current flowing through the resistance $R'$ does not change. What is the value of the resistor $R'?$