Answer:
The speed of the wire is 5 m/s.
Explanation:
Given that,
Length = 20 cm
Magnetic field = 0.1 T
Current = 10 mA
Resistance [tex]R= 10\Omega[/tex]
We need to calculate the speed of the wire
Using formula of emf
[tex]\epsilon=Bvl[/tex]
Using formula of current
[tex]I=\dfrac{\epsilon}{R}[/tex]
Put the value of [tex]\epsilon[/tex] into the formula of current
[tex]I=\dfrac{Bvl}{R}[/tex]
[tex]v=\dfrac{IR}{Bl}[/tex]
[tex]v=\dfrac{10\times10^{-3}\times10}{0.1\times20\times10^{-2}}[/tex]
[tex]v= 5\ m/s[/tex]
Hence, The speed of the wire is 5 m/s.
