Q.
1

(i) Water that is behind a dam
(ii) Radio signals
(iii) An airplane idling on the runway
(iv) A satellite before it is launched
(v) A coiled spring
(vi) Heat harnessed from the oceans
Options:

  • A

    (i),      (iii),      (iv)     and     (v)

  • B

    (i),      (ii),       (iii)     and     (vi)

  • C

    (ii),      (iii),      (iv)     and     (v)

  • D

    (ii),     (iv),       (v)     and      (vi)