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.
If a radioactive atom emits a beta particle, Its mass number
increases by one
remains the same
decreases by one
increases by two
Correct answer is B
No explanation has been provided for this answer.
\(\frac{R}{5}\)
-\(\frac{R}{4}\)
\(\frac{5R}{36}\)
\(\frac{-5R}{36}\)
Correct answer is C
Given that W = -\(\frac{R}{n^2}\)
from n = 3 to n = 2.
-\(\frac{R}{3^2}\) - (-\(\frac{R}{2^2}\))
-\(\frac{R}{9}\) - (-\(\frac{R}{4}\))
-\(\frac{R}{9}\) + \(\frac{R}{4}\);
with LCM 36
\(\frac{-4R + 9R}{36}\)
= \(\frac{5R}{36}\)
Calculate the inductance L, of the coil in the circuit diagram shown above
3.8H
0.6H
0.4H
0.2H
Correct answer is B
XL = \(\frac{V}{I} = \frac{240}{2} = 120\Omega\)
L = \(\frac{X_L}{2 \pi f}\)
= \(\frac{120 \times \pi}{2 \times \pi \times 100}\)
= 0.6H
north-south
south-west
north-east
south-east
Correct answer is A
No explanation has been provided for this answer.
85.0%
83.3%
37.5%
30.0%
Correct answer is B
No explanation has been provided for this answer.