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Free MCQs & Online Quiz Practice for Exams

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Q: What is the radian measure between the arms of watch at 5.00 pm?

A) 1 radian

B) 2 radian

C) 3 radian

D) 4 radian

Answer: C. 3 radian

Q: 1° =

A) 0.01745 radian

B) 1 radian

C) 3.14 radian

D) 2π radian

Answer: A. 0.01745 radian

Q: The metric prefix for 0.000001 is

A) hecto

B) micro

C) deca

D) nano

Answer: B. micro

Q: Which of the following is the CORRECT way of writing units?

A) 71 Newton

B) 12 mu s

C) 8 Kg

D) 43 kg m⁻³

Answer: D. 43 kg m⁻³

Q: A student measures a distance several times. The readings lie between 49.8 cm and 50.2 cm. This measurement is best recorded as

A) (49.8±0.2) cm

B) (49.8±0.4) cm

C) (50.0±0.2) cm

D) (50.0±0.4) cm

Answer: C. (50.0±0.2) cm

Q: The percent uncertainty in the measurement of (3.76±0.25) m is

A) 4%

B) 6.60%

C) 25%

D) 376%

Answer: B. 6.60%

Q: The temperatures of two bodies measured by a thermometer are t₁=(20±0.5)℃ and t₂=(50±0.5)℃. The temperature difference and the error therein is

A) 30℃±0.0℃

B) 30℃±0.5℃

C) 30℃±1℃

D) 30℃±1.5℃

Answer: C. 30℃±1℃

Q: (5.0 m±4.0%) × (3.0 s±3.3%) =

A) 15.0 ms±13.2%

B) 15.0 ms±7.3%

C) 15.0 ms±0.7%

D) 15.0 ms±15.3%

Answer: B. 15.0 ms±7.3%

Q: (2.0 m±2.0%)³ =

A) 8.0 m³±1.0%

B) 8.0 m³±2.0%

C) 8.0 m²±5.0%

D) 8.0 m³±6.0%

Answer: D. 8.0 m³±6.0%

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

Answer: B. 28.8 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

Answer: D. 36.7

Q: [M⁰L⁰T⁰] are dimension of

A) Strain

B) Refractive index

C) Magnification

D) All of these

Answer: D. All of these

Q: The dimensions of torque are

A) [MLT]

B) [M²L²T]

C) [ML²T²]

D) [ML²T]

Answer: C. [ML²T²]

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°

Answer: 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

Answer: B. 3

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°

Answer: D. 120°

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

A) 9

B) 5

C) 3

D) 1

Answer: C. 3

Q: When Fₓ=3 N and F=5 N then Fᵧ =:

A) 6 N

B) 4 N

C) 2 N

D) 0 N

Answer: B. 4 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

Answer: C. 30 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

Answer: D. IV