Physics 1991 JAMB Past Questions

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4g of a radioactive material of half-life 10 days is spilled on a laboratory floor. How long would it take to disintegrate 3.5g of the material?

A. 1\(\frac{1}{4}\) days
B. 8\(\frac{1}{4}\) days
C. 30 days
D. 80 days

View Answer & Discuss (7) JAMB 1991

In a nuclear fusion process, four protons each of mass Mp were fused to produce a nucleus X of mass Mx. Which of the following equations is CORRECT?

A. 4M_p > M_x
B. 4M_p = M_x
C. 4M_p < M_x
D. M_p > M_x

View Answer & Discuss (3) JAMB 1991

Which of the following are True for \(\alpha\)-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change.

A. i and ii only
B. ii and iii only
C. i and iii only
D. i, ii, and iii only

View Answer & Discuss (3) JAMB 1991

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Which of the following phenomena is called photoelectric effect?

A. high energy electrons impinge on a metalic anode which then emits photons
B. a high energy photon emits photons as it slowed down
C. a metal absorbs quanta of light and then emits electrons
D. Two electrons are created from a quantum of light

View Answer & Discuss JAMB 1991

Find the tension T\(_1\) in the diagram above if the system is in equilibrium [G = 10ms\(^{-2}\)]

A. 200/√3N
B. 100/√3N
C. 300/√3N
D. 100N

View Answer & Discuss (8) JAMB 1991

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Physics 1991 JAMB Past Questions

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