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.
\(\frac{5}{9}\)\(\Omega\) in parallel
\(\frac{9}{5}\)\(\Omega\) in series
45\(\Omega\) in parallel
45\(\Omega\) in series
\(\frac{9}{5}\)\(\Omega\) in parallel
Correct answer is A
Given Data:
I\(_g\) = 100ma = 0.1A
R\(_g\)=5
where I\(_s\) = I - I\(_g\) → 1 - 0.1
I\(_s\) = 0.9
I\(_g\)R\(_g\) = I\(_s\)R\(_s\)
0.1 * 5 = 0.9 * R\(_s\)
R\(_s\) = \(\frac{0.1 * 5}{0.9}\)
R\(_s\) = \(\frac{5}{9}\)
i only
ii only
i and ii
ii and iii
iii only
Correct answer is E
No explanation has been provided for this answer.
i and ii
i and iii
ii and iv
ii and iii
i, ii and iii
Correct answer is D
No explanation has been provided for this answer.
A device that converts sound energy into electrical energy is?
the horn of a motor car
an A.C. generator
a microphone
the telephone
radio waves
Correct answer is C
The dynamic microphone is constructed with a small magnet that oscillates inside a coil attached to the diaphragm.
When a sound wave causes the diaphragm of the microphone to vibrate, the relative motion of the magnet and coil creates an electrical signal by magnetic induction.
high-energy electromagnetic waves
protons
streams of electrons
neutrons
radio waves
Correct answer is C
No explanation has been provided for this answer.