Physics Past Questions

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1111

In a nuclear reaction, the mass defect is 2 x \(10^{-6}\)g. Calculate the energy released given that the velocity of light is 3 x \(10^{8}ms^{-1}\)

A. 9 x \(10^{7}\)J
B. 1.8 x \(10^{8}\)J
C. 1.8 x \(10^{9}\)J
D. 9 x \(10^{-10}\)J
E. 3.6 x \(10^{11}\)J

View Answer & Discuss (5) WAEC 1997

1112

An atom radiates 1.5 x \(10^{-19}\)J of energy when an electron jumps from one energy level to another. What is the wavelength of the emitted radiation? (Planck’s constant =6.6 x \(10^{-34}\)Js. Speed of light in air=3 x \(10^{8}ms^{-1}\)

A. 1.32 x \(10^{-6}\)m
B. 2.98 x \(10^{-6}\)m
C. 3.32 x \(10^{-6}\)m
D. 6.82 x \(10^{-6}\)m
E. 8.01 x \(10^{-6}\)m

View Answer & Discuss (1) WAEC 1997

1113

What is the least possible error encountered when taking measurement with a meter rule?

A. 0.1mm
B. 1.0mm
C. 0.5mm
D. 0.2mm

View Answer & Discuss (30) JAMB 2014

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1114

A quantity which requires magnitude and direction to be specified is

A. Temperature
B. Distance
C. Displacement
D. Mass

View Answer & Discuss (5) JAMB 2014

1115

I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors?

A. II and IV
B. I and II
C. I and III
D. II and III

View Answer & Discuss (14) JAMB 2014

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