Waec Physics 2010 Past Questions and Answers

Question 51:

• WAEC 2010

A nuclide represented as \(^{70}_{32}X\) has a neutron-proton ratio of

A. 0.5
B. 0.8
C. 1.2
D. 1.5

Question 52:

• WAEC 2010

Neutrons are used to induce artificial radioactivity because they

A. Are energetic
B. Have no charge
C. Have no mass
D. Are ionizing

Question 53:

• WAEC 2010

A stone is projected vertically upward with a speed of 30ms\(^{1}\) from the top of a tower of height 50 m. Neglecting air resistance, determine the maximum height it reached from the ground. [g = 10 ms\(^-2\)]

Question 54:

• WAEC 2010

A force of 40 N is applied at the free end of a wire fixed at one end to produce an extension of 0.24 mm. If the original length and diameter of the wire art., 3 m and 2.0 mm respectively, calculate the: (a) stress on the wire; (b) strain in the wire.

Question 55:

• WAEC 2010

When a lead-acid accumulator is fully charged, evolution of gases occurs at the electrodes. Name these gases and the respective electrodes at which thcy are given off.