In the context of electric vehicle batteries, consider the following elements: I. Cobalt II. Graphite III. Lithium IV. Nickel. How many of the above usually make up battery cathodes?

Arrange the following electromagnetic radiations in decreasing order of their frequencies. 1. Gamma rays 2. Ultraviolet rays 3. Radio waves 4. X-rays

Assertion (A): The electric field inside a charged metallic sphere is zero. Reason (R): Charges reside only on the outer surface of a conductor. Choose the correct option.

Which of the following radiation is used to get relief from body aches ?

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A): Gauss's law in magnetostatics and electrostatics are respectively, ∮B·dS = 0 and ∮…

The conductivity of a strong electrolyte