Jamb Physics 2013 Past Questions and Answers

Question 41:

• JAMB 2013

To convert a galvanometer to a voltmeter, a

A. High resistance is connected to it in series
B. High resistance is connected to it in parallel
C. Low resistance is connected to it in parallel
D. Low resistance is connected to it in series

Question 42:

• JAMB 2013

Induced emfs are best explained using

A. Ohm's law
B. Faraday's law
C. Colomb's law
D. Lenz's law

Question 43:

• JAMB 2013

If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?

A. 2.4g
B. 3.2g
C. 4.6g
D. 4.8g

Question 44:

• 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 45:

• 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