If  | A + B | = |A|  = | B| then angle between A and B will be:

1.  90°

2. 120°

3. 0°

4. 60°

Subtopic:  Resultant of Vectors |
 66%
From NCERT
AIPMT - 2001
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The vector sum of two forces is perpendicular to their vector difference. In this case, the two forces: 

1. Are equal

2. Have the same magnitude

3. Are not equal in magnitude

4. Cannot be predicted

Subtopic:  Resultant of Vectors |
 70%
From NCERT
AIPMT - 2003
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 If |A×B|=3AB, then the value of |A+B| is: 

1. (A2+B2+AB3)1/2

2. A+B

3. (A2+B2+3AB)1/2

4. (A2+B2+AB)1/2

Subtopic:  Scalar Product | Vector Product |
 68%
From NCERT
AIPMT - 2004
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If a vector (2i^+3j^+8k^) is perpendicular to the vector (4i^-4j^+αk^), then the value of α is:

1. -1

2. -12

3. 12

4. 1

Subtopic:  Scalar Product |
 74%
From NCERT
AIPMT - 2005
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If the angle between the vector A and B is θ, the value of the product (B×A)A is equal to:

1. zero

2. BA2sinθcosθ

3. BA2cosθ

4. BA2sinθ

Subtopic:  Scalar Product | Vector Product |
 59%
From NCERT
AIPMT - 2005
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