Two identical fuses are rated at $10\,A$. If they are joined
Medium
Download our app for free and get started
A fuse is a piece of wire resistance which acts in a way such that if the voltage in a circuit exceeds the rating of the fuse then the fuse wire melts and the circuit becomes an open circuit, thereby breaking the circuit and preventing the components from getting damaged due to short circuit. Now, if two fuses are in series, the melting of a single fuse can break the circuit and so in series the rating will be $10 \mathrm{A}$. However, in parallel, even if one fuse is melted, the other fuse still works and so the net rating will be $20 \mathrm{A}$.
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 equal resistances each of value $R$ are joined as shown in the figure. The equivalent resistance between $M$ and $N$ isView Solution
- 2Three resistors are connected to form the sides of a triangle $ABC$, the resistance of the sides $AB$, $BC$ and $CA$ are $40\,ohms$, $60\,ohms$ and $100\,ohms$ respectively. The effective resistance between the points $A$ and $B$ in $ohms$ will beView Solution
- 3The current in a conductor varies with time t as $I = 2t + 3{t^2}$ where $I$ is in ampere and $t$ in seconds. Electric charge flowing through a section of the conductor during $t = 2\,\sec$ to $t = 3\,\sec$ is ............. $C$View Solution
- 4In a wire of cross section radius $r,$ free electrons travel with drift velocity $v$ when a current $I$ flows through the wire. What is the current in another wire of half the radius and of the same material when the drift velocity is $2v$ ?View Solution
- 5Effective resistance between $A$ and $B$ is ........... $\Omega$View Solution
- 6Calculate the net resistance of the circuit between $A$ and $B$View Solution
- 7Two identical fuses are rated at $10\,A$. If they are joinedView Solution
- 8A bulb rated at ($100\,W$ - $200\,V$) is used on a $100\,V$ line. The current in the bulb isView Solution
- 9The series combination of two batteries, both of the same emf $10 \mathrm{\;V},$ but different internal resistance of $20\; \Omega$ and $5\; \Omega,$ is connected to the parallel combination of two resistors $30\; \Omega$ and $\mathrm{R}\; \Omega .$ The voltage difference across the battery of internal resistance $20\; \Omega$ is zero, the value of $\mathrm{R}(\text { in } \Omega)$ isView Solution
- 10If an electric heater is rated at $1000\, W$, then the time required to heat one litre of water from $20\,^oC$ to $60\,^oC$ isView Solution