2012-04-26

Physic Mcqs Ch.2

 Medical entry test [Physics] Ch. 2 mcqs:

These mcqs are prepared from physics 1st year chapter 2 especially for medical entry test by our team in order to help new students.
1- Whats the resultant of 3N and 4N forces acting at right angles
a-90N
b-5N
c-7N
d-1N

2-If A cross B is along z-axis then vectors A and B will lie in
a- zx plane
b- xy plane
c- yz plane
d-none
3-If A= 2i+4j+5k and B=-2i+2j+k. then A.B is
a-o
b-1
c--1
d-2

4-Parallel vectors of same magnitude 
a-equal
b-unequal
c-when added, give the sum zero
d-when multiplied give the sum zero

5-When the magnitude of two components of vectors are equal to that of their resultant, then the angle b/w components id
a-60
b-90
c-120
d-none

6-If two unit vectors are inclined at angle of 90, then magnitude of their resultant is
a-2
b- 21/2
c-under root 3
d-zero

7-If the vectors A and B represented in such a way that A+B=A-B, then the angle b/w A and B ia
a-o
b-60
c-90
d-180

8-The magnitude of dot and cross product of two vectors is 10 in each case. find the angle b/w two vectors
a-45
b-60
c-90
d-o

9-If A*B=-B*A then angle b/w A and B is
a-180
b180/3
c-180/2
d-180/4

10-Which of the following physical quantities are represented by axial vectors
a-displacement
b-force
c-velocity
d-torque

11-The two vectors have magnitude 3 and 5. if angle b/w them is 60, then dot product of two vectors is
a-7.5
b-6.5
c-8.4
d-7.9

12-The minimum number of vectors of equal magnitude required to produce a zero resultant is
a-2
b-4
c-3
d-none

13-The minimum number of vectors of unequal magnitude required to produce a zero resultant is
a-2
b-3
c-4
d-infinity

14-two forces of numerically equal to 10dynes  are acting ,then the resultant is
a-10dynes
b-20dynes
c-10(3)^1/2 dyne
d-5dynes

15-what is the angle between  i+j+k and i
a-180/6
b-180/4
c-180/3
d-none


6 comments:

  1. it will be better with answers

    ReplyDelete
  2. Answers:

    1. b
    2. b
    3. the answer is 9 which not in the given options
    4. a
    5. c
    6. b
    7. c
    8. a
    9. the * is not a defined operation for two vectors, anyhow if the question is like: A.B=-AB, the the angle between A and B will 180 (option a)
    10. d
    11. a
    12. a
    13. c
    14. Since the directions are not given the magnitude of the resultant may lie between 0 dynes to 20 dynes.
    15. d-none (the angle comes out to be 54.74 degrees)

    ReplyDelete
  3. Friends for some more MCQs like these please visit: http://physicsmcq.atspace.cc/

    ReplyDelete
  4. thats v gud way to help us thankuuuuu bro

    ReplyDelete

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