Answer:
C. It can be magnetized
Explanation:
As we know that Ferromagnetic materials are made up of small domains which can be treated as small magnets.
These small magnets are aligned in random directions so that the net magnetic field due to all small domains will cancel out and it gives no magnetic field by their own.
Now when these type of ferromagnetic substances are placed in external magnetic field then due to the external field these all domains are aligned in the direction of external magnetic field.
Due to this alignment of domains ferromagnetic substance produce their own field and this phenomenon is known as magnetization
So here correct answer will be
C. It can be magnetized
Answer:
with what? I can help but with what
Answer:
you can't see your back because your neck can only move in fixed direction
Answer:
yes there will be change in its density
Answer:
The wavelength of the electron is
Explanation:
Given that,
Temperature = 300 K
We know that,
The energy of free electron is
Where, k = wave number
The momentum of the electron is
Th effective mass is
We need to calculate the wavelength of the electron
Using formula of wave number
Put the value of k
We know that,
Thermal energy of electron
The de Broglie wavelength of the electron is
Put the value into the formula
Hence, The wavelength of the electron is