Two resistors of 6 Ω and 3 Ω are connected in parallel. Equivalent resistance is MCQ with Answer and Explanation

Explanation:
A lactometer is a specific type of hydrometer used to test the purity of milk by measuring its relative density. All hydrometers, including lactometers, work on Archimedes' Principle of buoyancy. They float at a depth that depends directly on the density of the liquid; they sink deeper in less dense liquids (like milk heavily diluted with water).

Explanation:
Pascal's law: pressure applied enclosed fluid transmits undiminished. Hydraulic brakes, lift.

Explanation:
Ideal solenoid interior has uniform magnetic field B = μ₀ n I, parallel to axis. Outside field weak. Used in electromagnets, relays. Uniformity for scientific instruments.