Physics 1980 JAMB Past Questions

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Which of the following statements are true of the law of universal gravitation?

A. any two bodies attract each other with a force which is proportional to the difference of their masses
B. any two bodies attract each other with a force which is inversely proportional to the square of the distance between them
C. any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them
D. any two bodies attract each other with a force which is proportional to the square of the distance between them
E. any two bodies attract each other with a force which is proportional to the sum of their masses

Which of the following is true of an electrical charge?

Which of the following statements are true in the structure of atoms?

A. the atoms of the differnt element differ only in the number of protons and electrons
B. the num,ber of protons equals the number of electrons
C. atoms are constructed according to the plan of our solar system
D. all of the above
E. A and C only

Which of the following are true of atom?

A magnet is similar to a bipolar charged system in that

A. it consists of two opposite poles - the north and south poles
B. the earth's magnetic field has a south pole near the geographical north pole and a north pole near the geographical south pole
C. the force of attraction and repulsion between opposite and between like poles obeys a law for electrostatic charges
D. A and B only
E. A and C only