Physics - Cross Product

B.

It measures how much two vectors point in different direction, that is how much perpendicular the two vectors are with each other.
A. Dot product
B. Cross product

A. True

2. Cross product obeys the right-hand rule. Thus, the torque vector is always perpendicular to the plane formed by the position vector r and force vector F. These statements are __________.
A. True
B. False
C. Partly true
D. Partly false

B. 0

What is the cross product of two vectors A and B which are parallel with each other?
A. 1
B. 0
C. -1
D. undefined

A. 90˚

the cross product of vectors A and B is equal to C, C = A x B. The magnitude of vector C is at its maximum if the angle between vectors A and B is ____________.
A. 90˚
B. 0˚
C. 180˚
D. 270˚

B. False

A x B = B x A. This expression is _________.
A. True
B. False
C. Partly true
D. Partly false

C. Partly true
D. Partly false

i x j = k, j x k = i, k x i = j, j x i = k, k x j = i, i x k = j. These expressions are __________.
A. True
B. False
C. Partly true
D. Partly false

C. They are orthogonal with each other.

What can you say about vectors A and B if A x B = 0, and A & B are not null vectors?
A. They are anti-parallel with each other.
B. They are parallel with each other.
C. They are orthogonal with each other.
D. Cannot be determined

A. True

I x i = j x j = k x k = 0. This expression is _________.
A. True
B. False
C. Partly true
D. Partly false

C. Both A and B are correct.

m(A x B) = (A x B)m. What can you say about this expression?
A. This expression is valid for cross product.
B. This expression can be expressed as mA x B.
C. Both A and B are correct.
D. Both A and B are incorrect.

B. A vector quantity with both magnitude and direction.

What is produce by the cross products of two vectors?
A. A scalar quantity with magnitude only.
B. A vector quantity with both magnitude and direction.
C. A scalar quantity with both magnitude and direction.
D. A vector quantity with magnitude only.