The function of a fuse in a domestic circuit is to
A. Reduce current
B. Protect against short circuit and overload
C. Regulate voltage
D. Increase power factor
Answer: Option B
Solution (By JKSSB Mock Tests)
Fuse is a safety device: thin wire melts when current exceeds safe limit due to short circuit or overload, breaking circuit. Prevents fire and appliance damage. Based on heating effect. MCB is modern alternative.
Explanation:
Buoyant force = weight of displaced fluid = (volume of body submerged) × density_fluid × g. Depends on volume displaced and g. Not density of body.
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