Use the diagram above to answer the question below.

Which of the following diagrams represents the magnetic field of two isolated unlike poles

Use the figures above to answer the question below

Which of the following diagrams represents correctly an n-p-n transistor?

When the base current of a common-emitter transistor is kept at zero, it operates in the 

In the photoelectric effect, which of the following graphs correctly represents the graph of stopping potential Vo against frequency,f, of incident light?

The amount of energy released when 0.5kg of uranium is burnt completely is [c = 3 x 10\(^8\)m/s]