Question

In the two ‘set-ups' X and Y, shown on the next page, the wires AB and PQR
are made of the same material and have equal 'thickness. The length of the
wire AB, (in the set-up X') is equal to the diameter (= PR) of the semi-circle,
formed by the wire PQR, (in the set-up 'Y'). Pins, Pl and P2, are attached, to
wires AB and PQR respectively, with the help of wax. Which of the two pins,
P1 or P2, will fall off later? Give reason for your answer.
​

Answer 1

pin p2 falls first because the air rises when heated and passes through the wire so the pin p2 falls first

Answer 2

Answer:

pin 2will falls first

Explanation:

diameter it is always less than length of of the earth of a semicircle. hence, travel sooner to pin P1 than to pin

P2.This means