The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?

Related Mcqs:

1. The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________?

   A. 30°
   B. 45°
   C. 60°
   D. 180°

2. Which of the following can not be the resultant of two vectors having magnitude 10N and 15N?

   A. 18N
   B. 22N
   C. 25N
   D. 30N

   Submitted by: Zahid Jagirani

3. Which of the following pair of forces can produce a resultant of 8N?

   A. 2N & 5N
   B. 20N & 2N
   C. 3N & 6N
   D. 4N & 1N

   Submitted by: Zahid Jagirani

4. The magnitude of i^. (j^ x k^) is________________?

   A. 0
   B. 1
   C. -1
   D. i^

5. Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?

   A. zero
   B. focus
   C. 2 f
   D. f/2

6. By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?

   A. 10²
   B. 10³⁶
   C. 10¹²
   D. None of these

   Submitted by: Nayab Idrees

7. Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?

   A. 4 x 10-10 m
   B. 2 x 10-10 m
   C. 0.02×10-10m
   D. 20×10-10m

8. The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?

   A. π
   B. 3π
   C. 6π
   D. 12π

9. What is the angle of projection for which the range and maximum height become equal ?

   A. tan-1 ¼
   B. tan-1 4
   C. tan-1 ½
   D. tan-1 2

10. An angle between two vectors A and B can be determined by_____________?

    A. Their dot product
    B. Their cross product
    C. Head to tail rule
    D. Right-hand rule