Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 136:

• JAMB 2012

Which of the following metals will provide the greatest shield against ionizing radiation

A. Iron
B. Manganese
C. Alminium
D. Lead

Question 137:

• JAMB 2012

The process of energy production in the sun is

A. Nuclear fission
B. Nuclear fussion
C. Electron collision
D. Radioactive decay

Question 138:

• JAMB 2013

Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV

A. -9.20eV
B. -8.20eV
C. -2.75eV
D. -1.75eV

Question 139:

• JAMB 2013

In photo-emission, the number of photo-electrons ejected per second depends on the

A. Frequency of the beam
B. Work function of the metal
C. Threshold frequency of the metal
D. Intensity of the beam

Question 140:

• JAMB 2013

The energy of a photo having a wavelength of 10^-10m is
(h= 6.63 x 10 ^-34Js, c =3.0 x 10 ⁸ms^-1)

A. 2.0 x 10 ^-15J
B. 1.7 x 10 ^-13J
C. 2.0 x 10 ^-12J
D. 1.7 x 10 ^-12J