Physics MCQs

Physics

Vectors and Equilibrium


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#9

The sum of two vectors $\vec{A}$ and $\vec{B}$ is found by which method?

A) Head-to-tail rule

B) Parallelogram rule

C) Both A and B

D) Cross product

Answer:   C
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#10

The dot product of two perpendicular vectors is:

A) Maximum

B) Zero

C) Negative

D) Minimum

Answer:   B
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#11

What is the dot product of two parallel vectors?

A) 0

B) $AB\cos\theta$

C) $AB$

D) $AB\sin\theta$

Answer:   C
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#12

The cross product of two parallel vectors is:

A) A null vector

B) Maximum

C) A scalar

D) Negative

Answer:   A
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#13

The direction of the cross product of $\vec{A}$ and $\vec{B}$ is given by:

A) Left-hand rule

B) Right-hand rule

C) Fleming's rule

D) Newton's rule

Answer:   B
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#14

If $\vec{A} \cdot \vec{B} = 0$, then the angle between vectors $\vec{A}$ and $\vec{B}$ is:

A) $0^\circ$

B) $45^\circ$

C) $90^\circ$

D) $180^\circ$

Answer:   C
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#15

The cross product of two vectors $\vec{A}$ and $\vec{B}$ is represented as:

A) $\vec{A} \cdot \vec{B}$

B) $\vec{A} \times \vec{B}$

C) $\vec{A} + \vec{B}$

D) $\vec{A} - \vec{B}$

Answer:   B
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#16

Torque is a measure of the turning effect of a force and is given by:

A) $\tau = \vec{r} \cdot \vec{F}$

B) $\tau = \vec{r} \times \vec{F}$

C) $\tau = F/r$

D) $\tau = F \times r$

Answer:   B
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