A metallic wire is loaded at ends with two masses is placed over a slab of ice.
This wire passes through slab without splitting it into two pieces. This is due to
(a) depression of melting point
(b) elevation of melting point
(c) high conductivity of metal wire
(d) high specific heat of ice
Answer is : (a) depression of melting point
Ice melts at lower temperature due to increase in pressure. As wire passes, the water formed is again freezes and hence wire passes without cutting ice.