The vector product of two parallel vectors is
Correct answer: A. zero
- A. zero
- B. maximum and equal to AB
- C. equal to AB cos theta
- D. a scalar
Explanation
The cross product has magnitude AB sin theta, and sin 0 is zero, so parallel vectors give a null vector. It is maximum for perpendicular vectors, which is the opposite of the dot product and the easiest way to keep the two straight. The result of a cross product is always a vector, never a scalar.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Vector Product
The vector product, or cross product, gives a vector perpendicular to two multiplying vectors, with magnitude AB sin θ and direction set by the right-hand rule. It covers properties such as anti-commutation, area from cross products, torque and angular momentum. Unlike the dot product, its result is a vector.
Practise Vectors and Equilibrium
431 free Vectors and Equilibrium MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Vector Product questions
The direction of the vector product A cross B is given by
Torque is defined as
The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________?
If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?