alleryA short-circuit happens when:
ALive and neutral wires touch directly
BEarth wire breaks
CVoltage is too low
DInsulation is too thick
Answer & Solution
Correct answer: A. Live and neutral wires touch directly
1. Short-circuit: live and neutral wires come into direct contact (low-resistance path).
2. Current shoots up dramatically (I = V/R, R very small).
3. Generates intense Joule heat — fire hazard.
4. A correctly rated fuse should melt instantly and break the circuit.
_Source: syllabus Science Ch 12 §12.8.1 Short-Circuit_
Keep practising Effects of Electric Current
Browse all Effects of Electric Current questions for CBSE Class 10, or explore more Science topics.
Related questions
Match each household safety component with its duty:Match each domestic alternating current feature with its Indian standard value:Match each electromagnetic vector rule with the quantity it determines:Match each electromagnetic device/concept with its inventor or principle:Match each thermal and power relationship with its formula:Match each resistor combination rule with its formula:Match each factor affecting resistance of a cylindrical conductor:Match each electrical quantity with its defining formula and SI unit: