Post Utme Physics Past Questions and Answers

Question 306:

In the transformer, the magnetism of the core is repeatedly reverse by themagnetic field resulting in energy as heat. The loss is called ____________

A. Eddy current
B. Hysteresis loss
C. Flux linkage
D. Joule heating loss

Question 307:

The light from the sun reaches the earth mainly by ____________

A. Convection
B. Conduction
C. Radiation
D. Reflection

Question 308:

One valid assumption of the kinetic theory of gases is that ____________

A. The molecules are in random motion and the number of collisions is constant
B. The number of molecules increases with the pressure
C. The molecules of the gas are all identical and are very small in size
D. The number of molecules
increases with temperature

Question 309:

An astronomical telescope is said to be in normal adjustment when the ____________

A. Eye is accommodated
B. Focal length of the objective lens is longer than that of the eye piece
C. Final image is at the near point of the eye
D. Final image is at infinity

Question 310:

Which of these statements is correct about cathode rays. They are fast moving

A. Atoms
B. Neutrons
C. Electrons
D. Ions