## Book Store

Currently only available for.
CBSE Gujarat Board Haryana Board

## Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to
...(mm)2

1.5 x 104 mm2

The total surface area of a cylinder of radius r and height h is

S = 2πr (r + h).

265 Views

Give four examples of physical quantities.

Examples of Physical quantitie are force, mass, density and power.
821 Views

Define unit.

The quantity used as a standard of measurement is called unit.

Example: Unit of time is second.

1172 Views

What is measurement?

Measurement is the process of attaching a numeric value to an aspect of a natural phenomenon. Measurement is making the quantitative knowledge of a physical quantity.
1289 Views

What is the need of measurement?

To get the complete knowledge of any physical quantity, measurement is needed. Measurement of any physical quantity involves comparison with a certain basic, arbitrarily chosen, internationally accepted reference standard called unit. Knowledge without measurement is incomplete and unsatisfactory.
825 Views

Define physical quantity.

A measurable quantity in terms of which laws of Physics can be expressed is called physical quantity.

The result of a measurement of a physical quantity is expressed by a number accompanied by a unit.

878 Views