PART - 3 CH - 11 Electricity — Science STD 10 — Question

Name the respiratory organ of fish.

Write the chemical reaction that takes place.

Name the scientist who first suggested that a force would act on a current-carrying wire placed in a magnetic field.

Which compound is used to detect the formation of carbon dioxide gas?

What is cataract? How is the vision of a person having cataract restored?

What are five R’s used to save environment?

Which type of connection is done for electric appliances?

Write the molecular formula of soda ash.

What is the function of ozone in the upper atmosphere?

Identify the device used as a spherical mirror or lens in the following cases, when the image formed is virtual and erect in each case.
(1) An object is placed between the device and its principal focus. The image formed is enlarged and behind the device.
(2) The object is placed between the principal focus and device. The image formed is enlarged and on the same side as that of the object.
(3) The object is placed at finite distance from the device (i.e., between infinity and device). The image formed is diminished and lies between the principal focus and optical centre and on the same side as that of the object.
(4) The object is placed at finite distance from the device (i.e., between infinity and device). The image formed is diminished and lies between the pole and principal focus as well as behind it.