Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
A nuclide is represented by \(_{32}^{70}B\). Determine its neutron-proton ratio
0.5
0.8
1.2
1.5
Correct answer is C
The element B has a mass number of 70 with atomic number 32. Hence, B has 32 protons and (70-32) = 38 neutrons.
The neutron- proton ratio is 38:32 = \(\frac{38}{32} = 1.1875\)
\(\approxeq 1.2\)
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.