Jamb Physics 2015 Past Questions and Answers

Question 41:

• JAMB 2015

The optical instrument which is suitable for viewing a nearby objects is ...........?

A. Telescope
B. Sextant
C. Microscope
D. Periscope

Question 42:

• JAMB 2015

The symbol _−1⁰X used to represent which of the particles?

A. Proton
B. Neutron
C. Electrons
D. Atoms

Question 43:

• JAMB 2015

A radioactive source emits X—rays of very short wavelength (10 -13m ) what is the frequently of these rays?

A. 2 à— 10¹⁸HZ
B. 3 × 10 ¹⁹HZ
C. 3 à— 10²¹HZ
D. 3 à— 10^-19HZ

Question 44:

• JAMB 2015

The strength of an electromagnet increase with

A. Increase in the number of turn of the coil
B. Decrease in current with the coil
C. Increase in the distance between the pole
D. Increase in current without the coil

Question 45:

• JAMB 2015

A platinum resistance thermometer wire has a resistance of 70hms at 0°Cand 7.5 Ohms at 100°C. Calculate the temperature of the wire when the resistance is 7.2 Ohms

A. 15°C
B. 40°C
C. 20°C
D. 10°C