Vectors and Equilibrium — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#41 Which of the following is an example of a scalar product?
A) Force
B) Velocity
C) Work
D) Torque
#42 Which of the following is an example of a vector product?
A) Power
B) Work
C) Torque
D) Energy
#43 The cross product of two vectors is maximum when the angle between them is:
A) $0^\circ$
B) $45^\circ$
C) $90^\circ$
D) $180^\circ$
#44 The dot product of two vectors is maximum when the angle between them is:
A) $0^\circ$
B) $45^\circ$
C) $90^\circ$
D) $180^\circ$
#45 What is the magnitude of a null vector?
A) 1
B) Infinity
C) Zero
D) Depends on the vector
#46 Vector subtraction $\vec{A} - \vec{B}$ is equivalent to:
A) $\vec{A} + (-\vec{B})$
B) $\vec{A} + \vec{B}$
C) $\vec{A} \times \vec{B}$
D) $\vec{B} - \vec{A}$
#47 The law of sines for vector addition is used for:
A) Finding the direction of a vector
B) Finding the magnitude of a vector
C) Solving for forces in equilibrium
D) All of these
#48 What is the component of a vector $\vec{A}$ along the y-axis?
A) $A\sin\theta$
B) $A\cos\theta$
C) $A\tan\theta$
D) $\sqrt{A_x^2 - A_y^2}$
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