The discovery that one current-carrying wire exerts a force on a second current-carrying wire was made by _________. Coulomb Oer
2 answers:
Answer:
The discovery that one current-carrying wire exerts a force on a second current-carrying wire was made by <u>Ampere</u>
Explanation:
Two current carrying wires exert force on each other. This was discovered by Ampere. It is also known as Ampere's force law.
A current carrying wire produces magnetic field around it. Another current carrying wire kept nearby experiences magnetic force by the first one.
The force is given by:
where I₁ and I₂ are the currents in the two wires and r is the distance between them.
The force may be attractive or repulsive depending upon the direction of current flowing in the two wires.
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b. 460.8 m/s
Explanation:
The relationship between the speed of the wave along the string, the length of the string and the frequency of the note is
where v is the speed of the wave, L is the length of the string and f is the frequency. Re-arranging the equation and substituting the data of the problem (L=0.90 m and f=256 Hz), we can find v:
c. 18,000 m
Explanation:
The relationship between speed of the wave, distance travelled and time taken is
where
v = 6,000 m/s is the speed of the wave
d = ? is the distance travelled
t = 3 s is the time taken
Re-arranging the formula and substituting the numbers into it, we find: