What should be the characteristic of fuse wire?
Show Hint
- High melting point, high specific resistance.
- Low melting point, low specific resistance.
- High melting point, low specific resistance.
- Low melting point, high specific resistance.
The Correct Option is D
Solution and Explanation
Step 1: Understand the properties of fuse wire.
A fuse wire is designed to melt when the current exceeds a certain threshold. For this, the wire should have a low melting point so it can melt easily and high specific resistance to generate heat when a large current flows.
Step 2: Conclusion.
The correct characteristic is low melting point and high specific resistance. Final Answer: \[ \boxed{\text{Low melting point, high specific resistance.}} \]
Top Questions on Current electricity
An infinitely long straight wire carrying current $I$ is bent in a planar shape as shown in the diagram. The radius of the circular part is $r$. The magnetic field at the centre $O$ of the circular loop is :
- JEE Main - 2026
- Physics
- Current electricity
The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at \(V_z = 5\) V and the desired current in load is 5 mA. The unregulated voltage source can supply up to 25 V. Considering the Zener diode can withstand four times of the load current, the value of resistor \(R_s\) (shown in circuit) should be_______ \(\Omega\).
- JEE Main - 2026
- Physics
- Current electricity
- A moving coil galvanometer of resistance \(100\,\Omega\) shows a full scale deflection for a current of \(1\,\text{mA}\). The value of resistance required to convert this galvanometer into an ammeter, showing full scale deflection for a current of \(5\,\text{mA}\), is ________ \(\Omega\).
- JEE Main - 2026
- Physics
- Current electricity
- The reading of the ammeter (\(A\)) in steady state in the following circuit (assuming negligible internal resistance of the ammeter) is ________ A.
- JEE Main - 2026
- Physics
- Current electricity
A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances \[ (R_1=R_2=R_3=R_4). \] When \(R_3\) resistance is heated, its resistance value increases by \(10%\). The potential difference \((V_a-V_b)\) after \(R_3\) is heated is _______ V.
- JEE Main - 2026
- Physics
- Current electricity
Questions Asked in BITSAT exam
- What is the dot product of the vectors \( \mathbf{a} = (2, 3, 1) \) and \( \mathbf{b} = (1, -1, 4) \)?
- BITSAT - 2025
- Vector Algebra
- A bag contains 5 red, 3 blue, and 2 green balls. If two balls are drawn at random without replacement, what is the probability that both are red?
- BITSAT - 2025
- Probability
- A block of mass 5 kg is placed on a frictionless incline of angle $30^\circ$. What is the acceleration of the block down the incline? (Take $g = 9.8\, m/s^2$)
- BITSAT - 2025
- Projectile motion
- Find the value of $ \sin 75^\circ \cos 15^\circ + \cos 75^\circ \sin 15^\circ $.
- BITSAT - 2025
- Trigonometric Identities
- A ball is thrown vertically upward with a speed of 49 m/s. How long will it take to return to the thrower’s hand?
- BITSAT - 2025
- Kinematics