It is claimed that the strips S and S¹ serve two purposes I. to decide the end points of the wire and II. To keep the wires in place, then 

(a)  both I and II are important 

(b)  I is more important than II 

(c)  II is more important than I 

(d)  both are equally important

Consider two point masses m₁ and m₂ connected by alight rigid rod of length r₀. The moment of inertia of the system about an axis passing through their centre of mass and perpendicular to the rigid rod is given by

A ball is dropped onto a horizontal surface from a height of 36 cm. After bouncing several times it comes to rest covering a total distance of 100 cm measured in a vertical direction. The percentage loss in its kinetic energy after its first impact is

(a) 36 (b) 64 (c) 53 (d) 96 

The frequency of the pendulum having maximum amplitude is 

(a)  f₀ / 2 

(b)  f₀ 

(c)   2 f₀ 

(d)  not related to  f₀

An object is placed 30 cm away from a symmetric convex lens and an image two thirds of the size of the object is produced. The object is moved by a distance of 20 cm so as to get a magnified image. Now we get 

(a)  a real image of magnification 

(b)  a virtual image of magnification 5 

(c)  a real image at a distance of 40 cm 

(d)  a virtual image at a distance of 60 cm

A thin annular metal disc of inner and outer radii R₁ and R₂  respectively, is freely suspended from a point on its outer circumference. The length of the corresponding equivalent simple pendulum is

The equation correctly represented by the following graph is (a and b are constants)

(A)   x + y = b

(B)   ax² + by² = 0 

(C)   x + y = ab 

(D)  y = ax^b

Let a body be placed at a point on the earth’s surface at a latitude λ where the radius of the earth is R. Then, the body experiences an effective acceleration

(a)  g – Rω² cos λ

(b)  g + Rω² sin λ

(c)  g – Rω² cos² λ

(d)  g – Rω²/ cos²λ

In and atom an electron excites to the fourth orbit. When it jumps back to the energy levels a spectrum is formed. Total number of spectral lines in this spectrum would be 

(A)   3

(B)   4

(C)   5

 (D)   6 

A convex lens and concave lens are kept in contact and the combination is used for the formation of image of a body by keeping it at different places on the principal axis. The image formed by this combination of lenses can be : 

(A) Magnified, inverted and real

(B)  Diminished, inverted and real

(C) Diminished, erect and virtual

(D) Magnified, erect and virtual