Which of the following pair has same direction always ?

Related Mcqs:

1. If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?

   A. West
   B. North
   C. Down
   D. Up

2. When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to__________________?

   A. Centripetal force
   B. Gravitational force
   C. Their inertia
   D. Centrifugal force

3. When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________?

   A. 5m/s, 1m/s
   B. 3m/s, 3m/s
   C. 6m/s, 1m/s
   D. 4m/s, 2m/s

4. When body is in motion, ____________ always changes?

   A. its velocity
   B. its acceleration
   C. its position vector
   D. its momentum

5. When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?

   A. zero
   B. minimum
   C. infinity
   D. maximum

6. The breaking of crystals along definite direction is called _____________________?

   A. Cleavage
   B. Symmetry
   C. Isotropy
   D. Homogeneity

7. When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________?

   A. a straight line parallel to the field
   B. a parabola in a plane perpendicular to the field
   C. a circle in a plane perpendicular to the field
   D. a straight line along its initial direction

8. The direction of a vector in space is specified by_______________?

   A. One angle
   B. Two angle
   C. Three angle
   D. No angle

9. The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?

   A. 2i^ – 2j^ + k^
   B. (2i^ – 2j^ +k^)/9
   C. (2i^ – 2j^ +k^)/3
   D. (2i^ – 2j^ +k^)/5

10. Two parallel beams of positrons moving in the same direction will________?

    A. repel each other
    B. not interact with each other
    C. attract each other
    D. be deflected normal to the plane containing the two beams.

    Submitted by: Tauseef Ali