Why is a fuse connected in series within an electrical circuit__________________?
Show answer Hide answer
Answer: D. over heating
Explanation
An electrical fuse is placed in series to melt and break the circuit when excessive current causes overheating. Connecting the fuse in series ensures that the entire circuit current flows through it. When current exceeds safe limits, the internal wire overheats and melts to protect appliances. Electrical fuses contain a specially selected alloy wire with a low melting point. Placing safety devices in parallel would fail to interrupt the main current flow during a fault. Fuses act as sacrificial safety components designed to prevent electrical fires in buildings.
Household electrical panels use fuses or circuit breakers to safeguard wiring installations. Electricians select fuse ratings carefully based on the maximum current draw of appliances. Modern circuit breakers have largely replaced traditional single-use fuses in residential homes. Option A mentions high power, but fuses respond primarily to excessive current rather than power. Option B cites high voltage, whereas fuses are rated according to current rather than voltage. Option C mentions high current generally, but overheating is the specific mechanism causing the break.
Related questions
Q1. Mechanical work reaches its maximum value when the angle between force F and displacement vector d equals______________________?
Show answer Hide answer
Answer: D. 0°
Mechanical work formula includes the cosine of the angle between vectors. The cosine of zero degrees evaluates to the maximum value of one. Therefore, parallel force and displacement vectors produce maximum work. Work is...
Q2. What precisely are X-rays________________?
Show answer Hide answer
Answer: C. high energy photons
X-rays are packets of electromagnetic energy classified specifically as high-energy photons. Unlike electrons, photons possess no rest mass and travel at the speed of light. Wilhelm Röntgen discovered these mysterious ra...
Q3. The dimensional formula of work corresponds directly to that of__________________?
Show answer Hide answer
Answer: A. torque
Work is calculated as force multiplied by displacement distance along its line. Torque is calculated as force multiplied by perpendicular lever arm distance. Both physical quantities share the exact same dimensional form...
Q4. In their fundamental nature, X-rays share similarities with_______________?
Show answer Hide answer
Answer: C. γ-rays
X-rays and gamma rays are both forms of high energy electromagnetic radiation. They share identical fundamental wave and particle characteristics in physics. Their primary difference lies in their origin from atomic elec...
Q5. An instrument's zero error is classified as what kind of_________________?
Show answer Hide answer
Answer: C. Systematic error
A zero error is a consistent, reproducible flaw inherent to a measuring instrument's calibration, categorizing it as a systematic error. Because the offset remains constant across repeated trials, it shifts every recorde...
Q6. Which substance exhibits the widest forbidden energy gap ?
Show answer Hide answer
Answer: A. insulator
Insulators possess very wide forbidden energy gaps between valence and conduction bands. Thermal energy at room temperature cannot excite electrons across this wide gap. This absence of free charge carriers prevents elec...