How does lightning occur?

By Ohm's Law, if I have a well working circuit and I swap out the battery for a new battery which has double the Voltage drop, but I maintain the circuit's Resistance, what will happen to the Current?

Briefly explain why ferritic and austenitic stainless steels are not heat-treatable.

Using diagram differentiate between solenoid and a toroid

How strong is the earths magnetic field

What happens to inertia as you increase the mass?

Explain the relationship between motion and frame of reference.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.

When performing a battery load test, what should the load be set to?

If you push on a wall of a building what will happen

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.