Adaptive Practice
Physical World and Measurement
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Question 1 of 10
⏱ 0:30
Easy
Which of the following is a fundamental physical quantity?
Easy
The SI unit of electric current is:
Medium
The least count of a vernier caliper is 0.01 cm. If the main scale reading is 2.3 cm and the vernier scale reading is 7 divisions, what is the total length measured?
Easy
Which of the following statements about measurement is correct?
Medium
If the dimension of force is [M L T^{-2}], what is the dimension of work done?
Easy
A physical quantity is expressed as Q = 2.5 × 10^{3} m/s. What is the order of magnitude of Q?
Easy
Which instrument is best suited to measure the thickness of a human hair?
Hard
The dimensions of gravitational constant G in terms of M, L, and T are:
Medium
Which of the following is NOT a derived unit in the SI system?
Medium
A student measures the length of a table as 2.54 m with a meter scale having a least count of 1 mm. What is the percentage error if the actual length is 2.56 m?