A rod consists of aluminium for half its length and glass for the other half. One pin is fixed to each end of the rod using wax. The rod is then heated at its centre. A pin drops off once the wax has melted. Which statement is correct?
- APin P falls off first because aluminium is a better thermal conductor than glass.
- BPin P falls off first because aluminium is a worse thermal conductor than glass.
- CPin Q falls off first because glass is a better thermal conductor than aluminium.
- DPin Q falls off first because glass is a worse thermal conductor than aluminium.