Jamb Physics 1980 Past Questions and Answers

Question 41:

• JAMB 1980

The activity of a radioactive substance depends on

A. Temperature and purity
B. Temperature and age
C. Purity and age
D. Age, purity and temperature
E. None of the above

Question 42:

• JAMB 1980

Natural radioactivity consists of the emission of

A. \( \alpha \) -particle and \( \beta \) rays
B. \( \alpha \) -particle and X-rays
C. \( \gamma \)-rays and X-rays
D. \( \alpha \)-particle, \( \beta \) rays and \( \gamma \)-rays
E. \( \alpha \) -particle, \( \beta \) rays, \( \gamma \)-rays and X-rays

Question 43:

• JAMB 1980

What is the total resistance in the above diagram

A. 5 ohms
B. 15 ohms
C. 25 ohms
D. 35 ohms
E. 45 ohms

Question 44:

• JAMB 1980

The total capacitance of the circuit above is

A. 0.25mF
B. 0.50mF
C. 0.75mF
D. 1.25mF
E. 1.50mF

Question 45:

• JAMB 1980

The Diagram above shows the prism arrangement in a

A. Microscope
B. Tereoscope
C. Projector
D. Periscope
E. Gyroscope