NET Engineering MCQs

Systematic errors often arise from calibration or method bias.
Repeated measurements do not automatically remove them.

Distance is a scalar and depends on the actual path.
It is always nonnegative.

Random errors cause scatter around a central value.
Repeated measurements and averaging can reduce their effect.

Average speed uses total path length.
It does not depend on direction.

Leading zeros are not significant, but trailing zeros after a decimal are.
Thus 4, 5, and the final zero are significant.

Vector addition replaces multiple vectors with an equivalent single vector.
Its direction and magnitude depend on the original vectors.

Perpendicular vector components form a right triangle.
The resultant magnitude is found from the sum of squared components.

Both sides of a valid physical equation must have the same dimensions.
Dimensional analysis can reveal inconsistent formulas.

The newton is derived from base units as kg·m/s².
Metre, kilogram, and second are base units.

Precision describes repeatability.
Measurements can be precise without being accurate.

Each year, 90% of the previous value remains.
Thus, 50,000 × 0.9² = Rs. 40,500.

Compound growth gives 20,000 × 1.05².
The result is 22,050.