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Units And Measurement

Question
CBSEENPH11020718
Wired Faculty App

Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle

  • depends on v and not on R

  • depends on R and not on v

  • is independent of both v and R

  • depends on both v and R

Solution

C.

is independent of both v and R

The time period of circular motion of their charged particle is given by 

straight T space equals space fraction numerator 2 πr over denominator straight v end fraction space equals space fraction numerator 2 straight pi over denominator straight v end fraction space straight x mv over Bq straight T space equals space fraction numerator 2 πm over denominator Bq end fraction
Hence, time period of rotation of the charged particle in uniform magnetic field is independent of both v and R.

Some More Questions From Units and Measurement Chapter

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?

How many fundamental quantities are there in Physics?

Name the fundamental quantities of mechanics.

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