Subho Pal
Last Activity: 7 Years ago
T2 is directly proportional to L [T: period L: length of the pendulum]
At 250C T25=2 s
At 450C T45=(24*3600+8.64)/(24*3600/2) s
=2 + 8.64/(12*3600) s
=2.0002 s
L45/L25 =(2.0002/2)2 =1.0002=1+α.t=1+α.(45-25)=1+20*α
or, 20*α=0.0002
or, α=0.0002/20
therefore, α=10-5
option (B)10power-5 0C-1 is correct