Question

explain solenoid. please answer it ​

Answer 1

A solenoid is a device comprised of a coil of wire, the housing and a moveable plunger (armature). When an electrical current is introduced, a magnetic field forms around the coil which draws the plunger in. More simply, a solenoid converts electrical energy into mechanical work.

Hope it will help you...!!

Answer 2

Answer:

Viscosity and surface tension are the physical properties of the liquid. ... As the temperature increases, viscosity decreases. Surface tension decreases with increase in the temperature.