A body P is connected to a large body Q through a conducting rod of length L, cross-sectional area A and thermal conductivity K. This assembly is placed in an atmosphere of temperature T_(A)and body Q is also maintained at temperature T_(A). Let heat capacity of body P is C and it is initially at temperature T_(1). If in time t second temperatur4e of body P falls to T_(2). Then, choose the correct option.

A body P is connected to a large body Q through a conducting rod of le

1.	A body P is connected to a large body Q through a conducting rod of length L, cross-sectional area A and thermal conductivity K. This assembly is placed in an atmosphere of temperature T_(A)and body Q is also maintained at temperature T_(A). Let heat capacity of body P is C and it is initially at temperature T_(1). If in time t second temperatur4e of body P falls to T_(2). Then, choose the correct option.
Answer» `log((T_(2)-T_(A))/(T_(1)-T_(A)))=-(K_(1)(KA)/(LC))t` `log((T_(2)-T_(A))/(T_(1)-T_(A)))=-(K_(1)(KA)/(LC).t)` `log((T_(1)-T_(A))/(T_(2)-T_(A)))=-(K_(1)(KA)/(LC).t)` `log((T_(1)-T_(A))/(T_(2)-T_(A)))=-(K_(1)(KA)/(LC))t` ANSWER :B