Wednesday 25 February 2015

PHYSICS SECTION B



                   1. Consider the following statements.

   1.       If magenta and yellow coloured circles intersect the intersected area will have red colour.
   2.       If cyan and magenta coloured circles intersect, the intersected area will have blue colour.

Which of the statements given above is / are correct?

(a)    Only 1
(b)   Only 2
(c)    Both 1 and 2
(d)   Neither 1 nor 2

2.   Consider the following statements

1.       A flute of smaller length produces waves of lower frequency.
2.       Sound travels in rocks in the form of longitudinal elastic waves only.

Which of the statements given above is/ are correct?

(a)    Only 1
(b)   Only 2
(c)    Both 1 and 2
(d)   neither 1 nor 2


                     3.  Four wires of same material and of dimensions as under are starched by a load of same magnitude separately. Which one of them will be elongated maximum?

(a)    Wire of 1m length and 2 mm diameter
(b)   Wire of 2m length and 2 mm diameter
(c)    Wire of 3m length and 1.5mm diameter
(d)   Wire of 1m length and 1 mm diameter

                     4. Yellow colour light is used as fog light because yellow colour

(a)    Light is most scattered by fog
(b)   Has the longest wavelength among all colours
(c)    Has the longest wavelength among all colours except red and orange, but the red colour is already used for brake light and stop light whereas orange colour is avoided due to its similarity with red
(d)   Has the shortest wavelength among all colours not already reserved for other purpose

 5.  Consider the following statements
     X –rays
1.       Can pass through aluminum.
2.       Can be deflected by magnetic field
3.       Move with a velocity less than the velocity of ultraviolet rays in vacuum.

Which of the statements given above is / are correct?

(a)    1, 2 and 3
(b)   Only 1
(c)    2 and 3
(d)   1 and 2

                   6. A hot object loses heat to its surroundings in the form of heat radiation. The rate of loss of heat depends on the

(a)    Temperature of the object
(b)   Temperature of the surroundings
(c)    Temperature difference between the object and its surroundings
(d)   Average temperature of the object and its surroundings

                  7.  A proton and an electron having equal velocity are allowed to pass through a uniform magnetic field. Which one of the following statements is correct in the connection?

(a)    The proton and the electron experience equal and opposite force
(b)   The  proton experiences greater force than does the electron
(c)    The electron experience more force than does the proton
(d)   No moving charged particle experiences a force in a magnetic field

8.   The mirror used for the head light of a car is

(a)    Spherical concave
(b)   Plane
(c)    Cylindrical
(d)   Parabolic concave

                   9.  Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when

1.       The orbits geosynchronous.
2.       The orbit is circular.
3.       The orbit lies in the plane of the Earth’s equator.
4.       The orbit is at an altitude of 22236 km.

Select the correct answer using the codes given below

(a)    1, 2 and 3
(b)   1, 3 and 4
(c)    2 and 4
(d)   1,2,3 and 4

                     10. What is virtual private network?

(a)    It is a private computer network of a n organization where the remote users can transmit encrypted information through the server of the organization
(b)   It is a computer network across a public internet that provides users access to their  organization’s network while maintaining the security of the information transmitted
(c)    It is a computer network in which users can access a shared pool of computing resources through a service provider
(d)   None of the above


                    Answer:

1.       C
2.       D
3.       C
4.       D
5.       B
6.       D
7.       A
8.       A
9.       A
10.   B

No comments:

Post a Comment