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

Answer 1

Answer: (A)

$( A ) \rightarrow( S )$
We know that bimetallic strip works on the fact that solids expand on heating.
$(B) \rightarrow(Q)$
Thermal energy is converted into mechanical energy in steam engine.
$( C ) \rightarrow( P )$
In an incandescent lamp, due to conversion of energy, the lamp becomes hot. The hot body radiates energy by virtue of temperature.
(D) $\rightarrow$ (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.