Solve x +y = 11; 2x - 3y =7
90
Answers
Answer:
Magnitude of magnetic field = 3.771 × 10⁻³ T
Explanation:
Given:
Length of the solenoid = 25 cm = 0.25 m
Radius = 1 cm = 0.01 m
Current = 3 A
To Find:
Magnitude of magnetic field inside the solenoid
Solution:
Magnetic field at the centre of a solenoid is given by the formula,
\tt B=\mu_0\:nIB=μ
0
nI
where B is the magnetic field, I is the current passing through the solenoid.
Here n is given by,
\tt n=\dfrac{Total\:number\:of\:turns}{Length\:of\:the\:solenoid}n=
Lengthofthesolenoid
Totalnumberofturns
Substitute the data,
\tt n=\dfrac{250}{0.25}n=
0.25
250
\tt n=1000n=1000
Now substituting in the above formula we get,
\tt B=12.57\times 10^{-7}\times 1000\times 3B=12.57×10
−7
×1000×3
\tt \implies 3.771\times 10^{-3}\: T⟹3.771×10
−3
T
Hence the magnetic field inside the solenoid is 3.771 × 10⁻³ T.
Answer:
x= 125 y=-114
Step-by-step explanation:
x+y=11
2x-3y=790
2(x+y=11)
2x-3y=790
now subtract and get ans
5y=-570
y=-570/5
Y=-114
put the value of y in eq 1
x+y=11
x+(-114)=11
x=11+114
x=125