Jamb Physics 2015 Past Questions and Answers

Question 46:

• JAMB 2015

Which of the following will increases the boiling point of water?
I. Taking it to a high altitude
II. Dissolving a salt into it
III. Heating it in a sealed flask
IV. Increasing the rate of heat supply
.

A. I only
B. III & IV only
C. II & III only
D. II only

Question 47:

• JAMB 2015

What is the magnitude of the couple which acts on a rotating circular disc of radius 2m, if a constant tangential force of 2N is responsible for the rotation.

A. 15Nm
B. 25Nm
C. 3Nm
D. 4Nm

Question 48:

• JAMB 2015

Transformers are designed so that energy losses are reduced to a minimum. This is achieved through those process.
I. Using a soft iron ore
II. Laminating the iron core to reduce energy loses due to eddy current
III. Designing an efficient iron core

A. I & II only
B. II only
C. I, II, & III only
D. III only

Question 49:

• JAMB 2015

The two liquids which are often used in thermometer on experiment basic is known as

A. Mercury only
B. Alcohol and Water
C. Mercury and Alcohol
D. Alcohol only

Question 50:

• JAMB 2015

Neutron were discovered by

A. J.J. Thompson
B. James Chadwick
C. Michael faraday
D. Dalton