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.
The activity of a radioactive substance depends on
temperature and purity
temperature and age
purity and age
age, purity and temperature
none of the above
Correct answer is E
No explanation has been provided for this answer.
same in sign and quantity
same in sign but greater
opposite in sign but greater
opposite in sign but less
opposite in sign but equal
Correct answer is E
No explanation has been provided for this answer.
According to Ohm's law, the ratio V/I is constant for
an electrolyte
a diode
a transistor
silver
all of the above
Correct answer is D
No explanation has been provided for this answer.
\(\frac{V_2}{I}\)
\(\frac{V_1}{I}\)
\(\frac{(V_1 + V_2)}{I}\)
\(\frac{(V_1 - V_2)}{I}\)
\(\frac{(V_2 - V_1)}{I}\)
Correct answer is E
On open circuit, V1 = I; On closed circuit V2 = IR + Ir
V2 = V1 + Ir
r = \(\frac{(V_2 - V_1)}{I}\)
33m
110m
220m
330m
495m
Correct answer is E
No explanation has been provided for this answer.