The current is defined as the amount of charge Q that passes through a certain point of a wire in a time
:
But the charge Q flowing in the wire is just the charge of a single electron, e, times the number of electrons N:
so the current can be rewritten as
Using
,
(charge of one electron), and
, we find the current:
Therefore correct answer is A).
Answer:
<em>The direction of the force is towards the East.</em>
Explanation:
Using the right hand rule, the force on the current carrying conductor is east.
In the right hand rule, if the hand is held with the fingers pointed parallel to the palm representing the magnetic field, and the thumb held at right angle to the rest of the fingers representing the direction of the current, then the palm will push in the direction of the force.
In this case, the thumb is pointing downwards, with the fingers pointing north away from the body in the direction of the earth's magnetic field, the palm will push east.
When all the lights are in series, and any one of them burns out
or is pulled out, or the wire between the lights is cut anywhere,
ALL the lights go out.
If all the lights were in parallel, then they're totally unaware of each
other, and the loss of any single light has no effect on the others.
Answer:
Explanation:
From the question we are told that:
Initial pipe length
Final pipe length
Generally the equation for Frequency f is mathematically given by
Where
And
V=speed of sound in air
Therefore