Free MCQs & Online Quiz Practice for Exams

Q: Compute the result to correct number of significant digit 1.513 m + 27.3 m =

A) 29 m

B) 28.8 m

C) 28.81 m

D) 28.813 m

Q: If 7.635 and 4.81 are two significant numbers. Their multiplication to significant digits is:

A) 36.72435

B) 36.724

C) 36.72

D) 36.7

Q: [M⁰L⁰T⁰] are dimension of

A) Strain

B) Refractive index

C) Magnification

D) All of these

Q: The dimensions of torque are

A) [MLT]

B) [M²L²T]

C) [ML²T²]

D) [ML²T]

Q: Two vectors lie with their tails at the same point. When the angle between them is increased by 20° their scalar product has the same magnitude but changes from positive to negative. The original angle between them was:

A) 0

B) 60°

C) 70°

D) 80°

Q: The minimum number of vectors of unequal magnitude required to produce a zero resultant is:

A) 2

B) 3

C) 4

D) 5

Q: If the resultant of two vectors each of magnitude A is also a magnitude of A the angle between the two vectors will be:

A) 30°

B) 45°

C) 60°

D) 120°

Q: The magnitude of vector A=2i+j+2k is:

A) 9

B) 5

C) 3

D) 1

Q: When Fₓ=3 N and F=5 N then Fᵧ =:

A) 6 N

B) 4 N

C) 2 N

D) 0 N

Q: A meter stick is supported by a knife-edge at the 50 cm mark. Arif hangs masses of 0.40 kg and 0.60 kg from the 20 cm and 80 cm marks respectively. Where should Arif hang a third mass of 0.30 kg to keep the stick balanced?

A) 20 cm

B) 70 cm

C) 30 cm

D) 25 cm

Q: If Ax=1.5 cm Ay=-1.0 cm into which quadrant does the vector A point?

A) I

B) II

C) III

D) IV

Q: Two forces of magnitude 20 N and 50 N act simultaneously on a body. Which one of the following forces cannot be a resultant of the two forces?

A) 20 N

B) 30 N

C) 40 N

D) 70 N

Q: If the dot product of two nonzero vectors A and B is zero then the magnitude of their cross product is:

A) 0

B) 1

C) AB

D) -AB

Q: The sum of magnitudes of two forces is 16 N. If the resultant force is 8 N and its direction is perpendicular to the minimum force then the forces are:

A) 6 N and 10 N

B) 8 N and 8 N

C) 4 N and 12 N

D) 2 N and 14 N

Q: For which angle θ is the maximum torque obtained?

A) 30°

B) 45°

C) 60°

D) 0.90

Q: A particle is acted upon by three concurrent forces of magnitudes 5 N 12 N and 13 N. What is the resultant force?

A) 5 N

B) 12 N

C) 13 N

D) 0 N

Q: If a body is in equilibrium under two forces the forces must be:

A) Equal in magnitude and parallel

B) Equal in magnitude and opposite in direction

C) Perpendicular

D) Any two forces can do it

Q: The component of a vector along the x-axis is known as:

A) Horizontal component

B) Vertical component

C) Resultant

D) Null vector

Q: Which of the following is true for a body in translational equilibrium?

A) Net force is zero

B) Net torque is zero

C) Acceleration is maximum

D) Velocity is increasing

Q: Which of the following is NOT a vector quantity?

A) Force

B) Displacement

C) Speed

D) Acceleration