Physics MCQS with Answers Set 2

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Physics MCQS with Answers


All of the following statements are correct except
The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece
The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses
The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece
The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent

A body moving in circular motion with constant speed has
Constant displacement
Constant kinetic energy
Constant acceleration
Constant velocity

A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be
100 W
125 W
64 W
80 W

The modulus of rigidity of a liquid is
Infinity
A value not one of those mentioned above
Zero
1

The mass of a proton is 1847 times that of an electron. An electron and a proton are projected into a uniform electric field in a direction at right angles to the direction of the field with the same initial kinetic energy.The
The relative curving of the trajectories will be dependent on the value of the initial kinetic energy
The proton trajectory will be less curved than the electron trajectory
The electron trajectory will be less curved than the proton trajectory
Both the trajectories will be equally curved

Which of the following four statement is false?
A body can have zero velocity and still be accelerated
The direction of the velocity of a body can change when its acceleration is constant
A body can have a constant velocity and still have a varying speed
A body can have a constant speed and still have a varying velocity

A capacitor acts as an infinite resistance for
Neither AC nor DC
DC
Both AC and DC
AC

The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:
Length
Time
Mass
None

To increase the magnification of a telescope
The objective and eyepiece both should be of large focal lengths
The objective lens should be of large focal length and eyepiece should be of short focal length
The objective should be small focal length and eyepiece should be of large focal length
Both the objective and eyepiece should be of smaller lengths

As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1, the kinetic energy K and potential energy U change as
K four fold, U two fold
K two fold, U four fold
K four fold, U also four fold
K two fold, U also two fold

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