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Two identical satellites SI and SII revolve round the earth in circular orbits at distance R and 3R respectively from the surface of the earth, where R is the radius of the earth. The ratio of linear momenta of SII to SI is

A√3 : 1
B1 : 3
C2 : 1
D1: √2

Two cylinders of same cross-section and length L but made of two materials of densities ρ1 and ρ2 are cemented together to form a cylinder of length 2L. If the combination floats in water with a length L/2 above the surface of water and ρ1 < ρ2, then

Aρ1 > 1 g cm^–3
Bρ1 > 3/2 g cm^–3
Cρ1 < 8/9 g cm^–3
Dρ1 < 3/4 g cm^–3

The given diagram shows a barometer.

If the atmospheric pressure is 76 cm Hg, then what is the value of h?

A75 cm Hg
B76 cm Hg
C77 cm Hg
D80 cm Hg

The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel with lamp X. What happens to the brightness of lamp Y?


A Brighter than normal
B Normal
C Dimmer than normal
D Very dim (cannot be seen).

A drunkard is walking along a straight road. He takes 5 steps forward and 3 steps backward and so on. Each step is 1 m long and takes 1 s. There is a pit on the road 11 m away from the starting point. The drunkard will fall into the pit after

A 21 s
B 29 s
C 31 s
D 37 s.

(A) 2

(B) 18

(C)

(D) 42

After removing some squares from a big square, the following figure is obtained. The length of one side of a small square is 3 cm. Find the area of the figure.

(A) 68 cm²

(B) 603 cm²

(C) 612 cm²

(D) 729 cm²

If Sonia observes Half Moon on 10th February, then what would be the shape of Moon on 17th February.

A

B

C

D

Identify the joints shown in the figures and select the incorrect option regarding these.


A Joint P allows movement in one plane.
B Joint Q allows movement in many planes.
C Knee bones have two P joints.
D Joint Q acts like a pivot and allows the circular motion of the part around it.

Read the following characteristics of a plant.
(i). Leaves are large and flat with upper surface coated with wax.
(ii). Stomata are present on the upper surface of leaves to facilitate gaseous exchange.
(iii). Roots are either poorly developed or totally absent.
Identify the plant and select the correct option regarding it

A The plant is adapted to grow in dry, desert like condition.
B The plant is a floating hydrophyte.
C The plant will grow well in soil or air of moderate humidity.
D The plant has special characteristic to minimize the rate of transpiration