61 Q) "A planet is moving around the sun in an elliptical orbit. Its speed is
"
(a)Same at all points of the orbit
(b)Maximum when it is farthest from the sun
(c)Maximum when it is nearest to the sun
(d)None of the above
62 Q) "Assertion (A) A cyclist always bends inwards while negotiating a curve.
Reason (R) By bending he lowers the centre of gravity.
"
(a)Both A and R are true and R is the correct explanation of A
(b)Both A and R are true but R is not the correct explanation of A
(c)A is true but R is false
(d)A is false but R is true
63 Q) "Which of the following are electromagnetic waves?
I. X-rays II. Visible light
III. IR-rays IV. Alpha rays
Select the correct answer using the codes given below"
(a)I, II, III and IV
(b) I, II and III
(c) II and III
(d) II and IV
64 Q) "The temperature of a body is an indicator of
"
(a) average kinetic energy of the molecules of body
(b) the total velocity of the molecules of body
(c) the total potential energy of the molecules of body
(d) average total energy of the molecules of body
65 Q) Which one among the following rays has minimum wavelength?
(a) Cosmic rays
(b) Gamma rays
(c) X-rays
(d) Ultra-violet rays
66 Q) "Which of the following statements is/are true?.
1. The angle of the axis in relation to the planer in which the earth revolves around the sun is not constant.
2. The amount of energy given off by the sun changes with the transparency of the atmosphere.
Select the correct answer using the codes given below"
(a)Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
67 Q) "Consider the following statements
I.Most of the IRS are launched by PSLV.
II.PSLV is used to place satellites in orbit of 3600 km above the Earth's surface.
Which of the statements given above is/are correct?"
(a)Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
68 Q) "Select the correct statement from the following
I.Radioactive decay obeys the law of exponential.
II.Electrons orbiting the nucleus are responsible for the radioactivity.
III.Half life period is greater than mean life period.
IV.After disintegration radiocarbon is converted to C-14.
Select the correct answer using the codes given below"
(a)I, II, III and IV
(b) I, II and III
(c) I and III
(d) I and IV
69 Q) "By which one of the following, an old written material which cannot be read easily, can be read?.
"
(a)a- rays
(b)y- rays
(c) X-rays
(d)IR- rays
70 Q) "Which one of the following is not an amorphous substance?
"
(a)Glass
(b) Polymer
(cj Rubber
(d) Copper
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