Test Details

Units And Measurement

Objective

Oct 19, 9:00 AM

30 minutes

Oct 19, 9:30 AM

30.0 marks

MCQ

30 questions

Dharmendra prasad

Given your background, you could offer Prasad Master Classes focusing on preparing students for JEE Mains and NEET examinations. Here's how you might structure your classes: Curriculum Design: Comprehensive coverage of Class 11 and 12 Physics syllabus. Emphasis on topics frequently tested in JEE Mains and NEET. Teaching Methodology: Conceptual understanding with real-life examples. Problem-solving techniques and shortcuts. Regular quizzes and mock tests to track progress. Resource Material:

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Physics

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Question Text

Question 2 :
Calculate the mean $$\%$$ error in five observations : $$80.0, 80.5, 81.0, 81.5, 82$$.

Question 3 :
Subtract $$2.5 \times {10}^{4}$$ from $$3.9 \times {10}^{5}$$ and give the answer to correct number of significant figures.

Question 5 :
A physical quantity has term of velocity,and force which are proportional to it .It is known that it does not depend on any other physical quantity ,so its dimension can be,

Question 6 :
Which of the following numbers has least number of significant figures?

Question 7 :
Calculate area enclosed by a circle of diameter $$1.06\ m$$ to correct number of significant figures.

Question 8 :
The radius of a sphere is $$5$$ cm. Its volume will be given by (according to the theory of significant figures) :

Question 9 :
In planetary motion the areal velocity of position vector of a planet depends on angular velocity $$\omega$$ and the distance $$r$$ of the planet from sun. If so, the correct relation for areal velocity is:

Question 10 :
Mark the formulae which is used to measure volume of a regular shaped object.

Question 12 :
If $$C$$ and $$L$$ denote the capacitance and inductance, the dimensions of $$LC$$ are

Question 14 :
If $$\mu =A+\dfrac { B }{ \lambda  } +\dfrac { C }{ { \lambda }^{ 2 } } $$ is dimensionally correct then the dimensions of A, B and C respectively are:($$\mu $$, A, B, C are constants) 

Question 15 :
If the unit of work is $$100J$$, the unit of power is $$1KW$$, the unit of time in second is:

Question 18 :
Dimensions of '$$ohm$$' are same as that of:(Given : $$h$$ is Planck's constant and $$e$$ is charge)

Question 21 :
Which two of the following five physical parameters have the same dimensions? A) Energy Density B) Refractive Index C) Dielectric Constant D) Young's Modulus E)Magnetic Field

Question 22 :
Which one of the following represents the correct dimensions of the coefficient of viscosity ?

Question 24 :
The frequency of vibration of a string is given by $$f=\dfrac {n}{2L} \sqrt {\dfrac {T}{m}}$$, where $$T$$ is tension in the string, $$L$$ is the length, $$n$$ is number of harmonics. The dimensional formula for $$m$$ is

Question 25 :
The number of uncertain digit/digits in measured length reported as $$ 41.68$$ units is

Question 26 :
The volume enclosed by the cylinder of diameter $$1.06\ m$$ and height 7.2 m to the correct no. of the significant figure is:

Question 28 :
Given that the displacement of an oscillating particle is given by $$y = A sin [Bx+Ct+d]$$. The dimensional formula for (ABCD) is:

Question 29 :
The least count of a stop watch is $$\dfrac{1}{5}$$ second. The time of $$20$$ oscillations of a pendulum is measured to be $$25$$ seconds. The maximum percentage error in the measurement of time will be

Question 30 :
If a measured quantity has $$n$$ significant figures, the reliable digits in it are :

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