Discussion
Which of the following would you choose for making a fuse wire?
Answer: B
A fuse wire should have high resistance, be thin and have a low melting point.
A fuse works by melting when too much current flows. Heat produced in a wire is I2R, so a high resistance makes it heat up quickly with excess current. A thin wire has higher resistance and heats faster, and a low melting point makes sure it melts and breaks the circuit before the appliance or wiring is damaged. Fuse wire is usually an alloy of tin and lead.
A thick wire (option A) would take too long to melt. Low resistance and high melting point (C, D) are the properties of connecting wires, which must not melt.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development