Heat Transfer - Jamb Physics Past Questions and Answers

Question 26:

• JAMB 2008

In a good thermos flask, the main cause of heat loss is?

A. Conduction through the cork
B. The plastic base of the thermos flask
C. The silvered walls and shiny metals
D. The outer cover or jacker

Question 27:

• JAMB 2009

A man standing 2 m from a charcoal fire is warmed mainly by

A. Convection
B. Radiation
C. Refraction
D. Conduction

Question 28:

• JAMB 2010

Heat is radiated by hot objects in the form

A. X-rays
B. Light energy
C. Infrared rays
D. Solar energy

Question 29:

• JAMB 2010

Heat is radiated by hot objects in the form

A. X-rays
B. Light energy
C. Infrared rays
D. Solar energy

Question 30:

• JAMB 2010

Which of the following has no effect on radiation?

A. Nature of surface
B. Density
C. Surface area
D. Temperature