Question

Column I gives some devices and Column II gives some processes on which the functioning of these devices depend. Match the devices in Column I with the processes in Column II.

Column I		Column II
A	Bimetallic strip	P	Radiation from a hot body
B	Steam engine	Q	Energy conversion
C	Incandescent lamp	R	Melting
D	Electric fuse	S	Thermal expansion of solids

• A. $(A)\to (S);(B)\to (Q);(C)\to (P);(D)\to (R)$
• B. $(A)\to (P);(B)\to (Q);(C)\to (S);(D)\to (R)$
• C. $(A)\to (Q);(B)\to (S);(C)\to (P);(D)\to (R)$
• D. $(A)\to (P);(B)\to (Q);(C)\to (S);(D)\to (R)$

Answer 1

Answer: (A)

$(A)\to (S)$
We know that bimetallic strip works on the fact that solids expand on heating.
$(B)\to (Q)$
Thermal energy is converted into mechanical energy in steam engine.
$(C)\to (P)$
In an incandescent lamp, due to conversion of energy, the lamp becomes hot. The hot body radiates energy by virtue of temperature.
(D) $\to$ (R)
In an electric fuse, electrical energy is converted into heat energy. If the current exceeds its permissible value, the fuse gets melted down because of the excessive heating.