Samacheer Kalvi solutions for Physics - Volume 1 and 2 [English] Class 11 TN Board chapter 1 - Nature of Physical World and Measurement [Latest edition]

One of the combinations from the fundamental physical constants is `"hc"/"G"`. The unit of this expression is ______

If the error in the measurement of the radius is 2%, then the error in the determination of the volume of the sphere will be ______

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of the acceleration due to gravity is ______

Which of the following has the highest number of significant figures?

If π = 3.14, then the value of π² is ______

Which of the following pairs of physical quantities have the same dimension?

The dimensional formula of Planck's constant h is ______

The velocity of a particle v at an instant t is given by v = at + bt². The dimensions of b are ______ 

The dimensional formula for gravitational constant G is ______

The density of a material in the CGS system of units is 4 g cm^-3. In a system of units in which the unit of length is 10 cm and unit of mass is 100 g, then the value of density of the material will be ______

If the force is proportional to the square of velocity, then the dimension of the proportionality constant is ______

The dimension of `(mu_0ε_0)^{1/2}` is ______

Planck’s constant (h), speed of light in vacuum (c), and Newton’s gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?.

A length-scale (l) depends on the permittivity (ε) of a dielectric material, Boltzmann constant (kB), the absolute temperature (T), the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for l is dimensionally correct?.

The length of a body is measured as 3.51 m, if the accuracy is 0.01m, then the percentage error in the measurement is ______

Briefly explain the types of physical quantities.

How will you measure the diameter of the Moon using the parallax method?

Write the rules for determining significant figures.

What are the limitations of dimensional analysis?

Define precision and accuracy. Explain with one example.

Explain the use of a screw gauge and vernier caliper in measuring smaller distances.

Write a note on the triangulation method and radar method to measure larger distances.

Explain in detail the various types of errors.

What do you mean by the propagation of errors? Explain the propagation of errors in addition and multiplication.

Write a short note on the following.

Unit

Write a short note on the following.

Rounding - off

Write a short note on the following.

Dimensionless quantities

Explain the principle of homogeneity of dimensions. What are its uses? Give example.

In a submarine equipped with sonar, the time delay between the generation of a pulse and its echo after reflection from an enemy submarine is observed to be 80 s. If the speed of sound in water is 1460 ms^-1. What is the distance of an enemy submarine? 

The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.

Assuming that the frequency γ of a vibrating string may depend upon i) applied force (F) ii) length (l) iii) mass per unit length (m), prove that ϒ ∝ `1/lsqrt(F/m)` using dimensional analysis.

Jupiter is at a distance of 824.7 million km from the Earth. Its angular diameter is measured to be 35.72˝. Calculate the diameter of Jupiter.

The measurement value of the length of a simple pendulum is 20 cm known with 2 mm accuracy. The time for 50 oscillations was measured to be 40 s within 1 s resolution. Calculate the percentage accuracy in the determination of acceleration due to gravity ‘g’ from the above measurement.