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
Answer : Option A
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
Answer : Option D
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
Answer : Option D
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
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. Which of the following has the highest number of significant figures?
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. If π = 3.14, then the value of π2 is
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. Which of the following pairs of physical quantities have same dimension?
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. The dimensional formula of Planck's constant h is
Answer : Option A
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
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. The dimensional formula for gravitational constant G is
Answer : Option B
Explaination / Solution:
No Explaination.
