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# 1).The engine of a truck moving a straight road delivers constant power. The distance travelled by the truck in time t is proportional toA. t B.

t 2 C. √t D. t 3/2

2).

A beam of light is converging towards a point I on a screen. A plane parallel plate of glass
(thickness in the direction of the beam = t, refractive index = μ ) is introduced in the path of the
beam. The convergence point is shifted by
A. t (μ - 1) away B. t (1 + 1/μ ) away C. t (1 - 1/μ ) nearer D. t (1 + 1/μ ) nearer

3).

The amount of work done by the labourer
who carries n bricks, each of mass m, to the roof
of a house whose height is h is
A. n mgh B. mgh/n C. zero D. ghn/m

4).

The equation of a transverse wave on a
stretched string is given by
y = 0.05 sin π (2t/0.002 -x/0.1 ) where x and y
are expressed in metres and t in sec.
The speed of the wave is
A.100m/sec B. 50 m/s C. 200 m/s D. 400 m/s

5).

An electric motor while lifting a given load produces a tension of 4500 N in the cable
attached to the load. If the motor winds the cable at the rate of 2m/s, then power must be
A. 9 kW B. 15 kW C. 225 kW D. 9000 H.P

2
by chahar2011