IIT-JEE Exam

What is the minimum energy required to launch a
satellite of mass m from the surface of a planet of
mass M and radius R in a circular orbit at an
altitude of 2R ?

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IIT-JEE Other Question

Two capacitors C1 and C2 are charged to 120 V
and 200 V respectively. It is found that by
connecting them together the potential on each one
can be made zero -
(1) 3C1 + 5C2 = 0 (2) 9C1 = 4C2
(3) 5C1 = 3C2 (4) 3C1 = 5C2 circular loop of radius 0.3 cm lies parallel to a
much bigger circular loop of radius 20 cm. The
centre of the small loop is on the axis of the bigger
loop. The distance between their centres is 15 cm.
If a current of 2.0 A flow through the smaller loop,
then the flux linked with bigger loop is