# UNIT I: Nature of Physical World and Measurement - Online Test

Q1. One of the combinations from the fundamental physical constants is hc/G . The unit of this expression is
Explaination / Solution:
No Explaination.

Q2. If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be
Explaination / Solution:
No Explaination.

Q3. If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is
Explaination / Solution:
No Explaination.

Q4. The length of a body is measured as 3.51 m, if the accuracy is 0.01mm, then the percentage error in the measurement is
Explaination / Solution:
No Explaination.

Q5. Which of the following has the highest number of significant figures?
Explaination / Solution:
No Explaination.

Q6. If π = 3.14, then the value of π2 is
Explaination / Solution:
No Explaination.

Q7. Which of the following pairs of physical quantities have same dimension?
Explaination / Solution:
No Explaination.

Q8. The dimensional formula of Planck's constant h is
Explaination / Solution:
No Explaination.

Q9. The velocity of a particle v at an instant t is given by v=at+bt2. The dimensions of b is
Explaination / Solution:
No Explaination.

Q10. The dimensional formula for gravitational constant G is
Explaination / Solution:
No Explaination.