• a. 1⁄2
• b. 16
• c. 1
• d. -1

• b. 16

# Q2  If A× B = A.B then the angle between A and B will be ( Read A X B as vector A cross Vector B )

• a. π
• b. π/2
• c. π/3
• d. π/4

• d. π/4

• ( a) 2
• (b) 4
• (c) 3
• (d) 1

• (d) 1

## Q4 The vectors A and B are such that their sum is equal to their difference. The angle between these two vectors will be

• a) 90^{0}
• b) 0^{0}
• c) 40^{0}
• d) 180^{0}

• a) 90^{0}

# Q5  If P⃗ ×Q⃗ =R⃗ , then which of the following statements is true?

• a) P⃗ 丄Q⃗
• b) R⃗ 丄Q⃗
• c)  R⃗ 丄 both Q⃗ and P⃗
• d) R⃗ 丄 (P⃗ XQ⃗)

• d) R⃗ 丄 (P⃗ XQ⃗)

• a. 7j
• b. 36j
• c. 24i
• d. 34k

• a. 7j

## Q7  The length indicates the _______ of the vector, whereas the arrow indicates the _______ of vector.

• a) magnitude, direction
• b) direction, magnitude
• c) Both a and b are correct
• d) None of these

• a) magnitude, direction

## Q8 The rain falling vertically downward with the velocity of 3km/hr. A person moves on a straight road with the velocity of 4 km/hr then the relative velocity of rain w.r.t. person is

• a) 1 km/hr
• b) 5 km/hr
• c) 4 km/hr
• d) 3km/hr

• b) 5 km/hr

• a) True
• b) false

• b) false

## __________ vector.

• a) Unit Vector
• b) null vector
• c) collinear vector
• d) None of the above

• b) null vector 