Answer: Option d: ideas of space travel.
Explanation:
Leonardo da Vinci was an Italian. He had numerous skills in various different fields. Leonardo contributed to technology for the effect of moon on the tides, his theory on formation of continents, human anatomy, art and much more. But he did not contribute in the ideas for space travel. Hence, the correct option is d.
Answer:
Therefore
Number of turns in the solenoid is 19407.
Explanation:
Given:
Strength magnetic field at its center,
B = 7.5 T
length of solenoid = l = 0.26 m
Current, I = 80 A
To Find:
Turn = N = ?
Solution:
If N is the number of turns in the length, the total current through the rectangle is NI. Therefore, Ampere’s law applied to this path gives
![\int {B} \, ds= Bl=\mu_{0}NI](https://tex.z-dn.net/?f=%5Cint%20%7BB%7D%20%5C%2C%20ds%3D%20Bl%3D%5Cmu_%7B0%7DNI)
Therefore,
![B =\dfrac{\mu_{0}NI}{l}](https://tex.z-dn.net/?f=B%20%3D%5Cdfrac%7B%5Cmu_%7B0%7DNI%7D%7Bl%7D)
Where,
B = Strength of magnetic field
l = Length of solenoid
N = Number of turns
I = Current
![\mu_{0}=Permeability\ in\ free\ space=4\pi\times 10^{-7}\ Tm/A](https://tex.z-dn.net/?f=%5Cmu_%7B0%7D%3DPermeability%5C%20in%5C%20free%5C%20space%3D4%5Cpi%5Ctimes%2010%5E%7B-7%7D%5C%20Tm%2FA)
![N=\dfrac{Bl}{\mu_{0}I}](https://tex.z-dn.net/?f=N%3D%5Cdfrac%7BBl%7D%7B%5Cmu_%7B0%7DI%7D)
Substituting the values we get
![N=\dfrac{7.5\times 0.26}{4\pi\times 10^{-7}\times 80}=19406.84=19407](https://tex.z-dn.net/?f=N%3D%5Cdfrac%7B7.5%5Ctimes%200.26%7D%7B4%5Cpi%5Ctimes%2010%5E%7B-7%7D%5Ctimes%2080%7D%3D19406.84%3D19407)
Therefore
Number of turns in the solenoid is 19407.
It would be the same, The Law of Conservation of Mass basically states that a closed system experiment would have the same mass before and after the experiment.
Answer:
E=7453.99 V/m
Explanation:
The electric field on the charged is given by
E= Kqx/(r^2 +x^2)^3/2
Where;
K= constant of Coulomb's law
q= magnitude of charge= 30.0×10^-9 C
r= radius of the rings= 5 cm or 0.05m
x= distance between the rings = 18cm = 0.18 m
Substituting values;
E= 9.0×10^9 × 30.0×10^-9 × 0.18 / [(0.05^2 + (0.18)^2]^3/2
E= 48.6/(2.5×10^-3 + 0.0324)^3/2
E= 48.6/(0.0025 + 0.0324)^3/2
E= 48.6/6.52×10^-3
E=7453.99 V/m