In which of the following fields is radioisotopes not used?
Medicine
Oil industry
Agriculture
Weather forecast
Correct answer is D
No explanation has been provided for this answer.
Which of the following radiations has the longest wavelength?
Gamma ray
Radio wave
Infrared ray
X-ray
Correct answer is B
Radio wave has the longest wavelength and shortest frequency.
I, II and IV only
I, III and IV only
III and IV only
I and II only
Correct answer is A
No explanation has been provided for this answer.
Which of the following is emitted in a process of natural radioactivity?
\(\alpha\)- particles and \(\beta\)- particles
\(\alpha\)- particles and X-rays
\(\beta\)- particles and X-rays
\(\lambda\)- rays and X-rays
Correct answer is A
In the course of natural radioactivity, alpha, beta and gamma rays are emitted.
A
B
C
D
Correct answer is B
By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Also, they form closed lines.
WAEC Subjects
Aptitude Tests