Jamb Physics 1994 Past Questions and Answers

Question 36:

• JAMB 1994

Which of the following are found in the receiver but not in the microphone of a telephone handset? i. Diaphragm. ii. soft iron pole pieces. iii. permanent magnet. iv.carbon blocks

A. I and ii
B. I and iv
C. Ii and iii
D. Iii and iv

Question 37:

• JAMB 1994

If two parallel conductors carry currents flowing in the same direction, the conducts will

A. Attract each other
B. Repel each other
C. Both move in the same direction
D. Have no effect on each other

Question 38:

• JAMB 1994

A certain radioisotope of \(^{235}_{92}U\) emits four alpha particles and three beta particles. The mass number and the atomic number of the resulting elements respectively are

A. 219 and 87
B. 84 and 223
C. 223 and 87
D. 219 and 81

Question 39:

• JAMB 1994

If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then

A. No electron will be emitted
B. The few electrons emitted will have a maximum kinetic energy of 1eV
C. The few electrons emitted will have a maximum kinetic energy of 3eV
D. Many electrons will be emitted

Question 40:

• JAMB 1994

A spring of length 25cm is extended to 30cm by a load of 150N attached to one of its end, what is the energy stored in the spring?

A. 3750J
B. 2500J
C. 3.75J
D. 2.50J