Physics Open Book Model Exam

A rectangular stripe measures 32.30m by 21m,find the area taking in to account significant figures:

• 6.783x10^2

• 6.78x10^2

• 6.7x10^2

• 6.8x10^2

Use the rules for significant figures to find the answer to addition problem: 21.4+15+17.17+4.003=_______

• 57.573

• 57.57

• 57.6

• 58

The precision of a measurement is 56.47 ± 0.02mm. the percentage uncertainty equals:

• 0.035417%

• 0.0354%

• 0.035%

• all of the above

Which 0f the following statement is not true about accuracy and precision in a measurement?

• Accuracy refers to how close a reading is to the true value

• precision refers to the closeness or exactness of measured value to each other

• The more precise a reading is the smaller the uncertainty

• If the measurement is precise then it is necessarily accurate

Systemic error occurred due to poor calibration of instrument that can be corrected by

• taking several reading

• replacing instrument

• taking mean of values

• taking median of values

Given that A and B are vectors, What is angle between B and C?

• 45°

• 90°

• 0°

• 180°

If A = (A/3) and B = (A/32), then what is the value of BXA?

• 10 m/s

• 13 m/s

• 7 m/s

• 0 m/s

If vector P is 6m in the X direction and vector q is 8m in y direction then what is the value of P + q?

• 10m at 53° from x axis

• 136m at 45° from x direction

• 10m at 37° from x axis

• 136m at 30° from x direction

Suppose A = (3i - j) and B = (-j - a), What is the value of a such that iBA2 = A + B?

• 3

• 2

• -2

• -3

The resultant and difference of two vectors A and B have equal non zero magnitudes. What can be said about the vectors?

• If both A and B makes angle 45° with each other.

• The two vectors can form a rectangle if appropriately joined

• The two vectors A and B are less than 90° with each other.

• When vector A and B parallel and ant parallel.