JEE Questions for Physics Vectors Quiz 1 - MCQExams.com


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  • 2)
    Physics-Vectors-94652.png

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Which of the following is not a vector quantity?
  • Weight
  • Nuclear spin
  • Momentum
  • Potential energy

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  • 2)
    Physics-Vectors-94200.png

  • Physics-Vectors-94201.png

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A force is inclined at angle 60° to the horizontal. If its rectangular component in the horizontal direction is 50 N, then magnitude of the force in the vertical direction is
  • 25 N
  • 75 N
  • 87 N
  • 100 N

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  • 30°
  • 45°
  • 60°
  • 90°

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  • 2)
    Physics-Vectors-94209.png

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The coordinates of a particle moving in XY-plane at any instant of time t are x = 4t2, y = 3t2. The speed of the particle at that instant is
  • 10 t
  • 5 t
  • 3 t
  • 2 t

  • Physics-Vectors-94213.png
How many minimum number of coplanar vectors having different magnitudes can be added to give zero resultant?
  • 2
  • 3
  • 4
  • 5
The square of resultant of two equal forces is three times their product. Angle between the forces is
  • π
  • 2)
    Physics-Vectors-94216.png

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If A = B + C and have A, B and C scalar magnitudes of 5, 4 and 3 units respectively, then the angle between A and C is

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  • 2)
    Physics-Vectors-94221.png

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If the angle between two vectors A and B is 120°, then its resultant C will be
  • C = |A–B|
  • C < |A–B|
  • C > |A–B|
  • C = |A+B|
If A = B + C and the values of A, B and C are 13, 12 and 5 respectively, then the angle between A and C will be

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  • 2)
    Physics-Vectors-94227.png

  • Physics-Vectors-94228.png

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Three concurrent coplanar forces 1 N, 2 N and 3 N acting along different directions on a body
  • can keep the body in equilibrium if 2 N and 3 N act at right angle
  • can keep the body in equilibrium if 1 N and 2 N act at right angle
  • cannot keep the body in equilibrium
  • can keep the body in equilibrium in 1 N and 3 N act at aaan acute angle
The resultant of two vectors P and Q is R. If the magnitude of Q is doubled, then the new resultant becomes perpendicular to P. Then, the magnitude of R is
  • P + Q
  • Q
  • P

  • Physics-Vectors-94232.png
  • P – Q
Two equal forces (P each) act at a point inclined to each other at an angle of 120°. The magnitude of their resultant is
  • P/2
  • P/4
  • P
  • 2P
Two equal vectors have a resultant equal to either of them, then the angle between them will be
  • 120°
  • 110°
  • 60°
  • 150°

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  • 2)
    Physics-Vectors-94238.png

  • Physics-Vectors-94239.png

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The (x, y, z) coordinates of two points A and B are given respectively, as (0, 3, –and (–2, 6, 4). The displacement vector from A to B may be given by

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  • 2)
    Physics-Vectors-94243.png

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  • Physics-Vectors-94245.png

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  • 2)
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  • 1 : 1
  • 2 : 1
  • –1 : 1
  • 3 : 1

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  • 45°
  • 60°
  • 75°
  • 30°
Vector A has a magnitude of 5 units lies in the XY- plane and points in a direction 120° from the direction of increasing X. Vector B has a magnitude of 9 units and points along the Z-axis. The magnitude of cross product A x B is
  • 30
  • 35
  • 40
  • 45

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  • cos-1 (-1/3)
  • cos-1 (1/4)
  • cos-1 (-1/2)
  • cos-1 (1/6)

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  • 10 units
  • 7 units

  • Physics-Vectors-94261.png
  • 8.5 units

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  • 2)
    Physics-Vectors-94265.png

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  • None of these
The direction of A is vertically upward and direction of B is in North direction. The direction of A × B will be
  • Western direction
  • Eastern direction
  • at 45° upward in North direction
  • vertically downward
For the vectors A and B making an angle θ. Which one of the following relations is correct?
  • A × B = B × A
  • A × B = AB sin θ
  • A × B = AB cos θ
  • A × B = –B × A
If the scalar and vector products of two vectors A and B are equal in magnitude, then the angle between the two vectors is
  • 45°
  • 90°
  • 180°
  • 360°
The sum of two vectors A and B is at right angle to their difference. Then,
  • A = B
  • A = 2B
  • B = 2A
  • A and B have the same direction

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  • 8
  • 10
  • 12
  • 16
0:0:1


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