NTA JEE Main 24th February 2021 Shift 2
For the following questions answer them individually
NTA JEE Main 24th February 2021 Shift 2 - Question 11
A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:
NTA JEE Main 24th February 2021 Shift 2 - Question 12
The figure shows a circuit that contains four identical resistors with resistance $$R = 2.0$$ $$\Omega$$, two identical inductors with inductance $$L = 2.0$$ mH and an ideal battery with E.M.F. $$E = 9$$ V. The current $$i$$ just after the switch $$S$$ is closed will be:
NTA JEE Main 24th February 2021 Shift 2 - Question 13
An X-ray tube is operated at 1.24 million volt. The shortest wavelength of the produced photon will be:
NTA JEE Main 24th February 2021 Shift 2 - Question 14
Match List - I with List - II.
| List-I | List-II |
|---|---|
| (a) Source of microwave frequency | (i) Radioactive decay of nucleus |
| (b) Source of infrared frequency | (ii) Magnetron |
| (c) Source of Gamma Rays | (iii) Inner shell electrons |
| (d) Source of X-rays | (iv) Vibration of atoms and molecules |
| (v) LASER | |
| (vi) RC circuit |
Choose the correct answer from the options given below:
NTA JEE Main 24th February 2021 Shift 2 - Question 15
If the source of light used in a Young's double slit experiment is changed from red to violet:
NTA JEE Main 24th February 2021 Shift 2 - Question 16
The de Broglie wavelength of a proton and $$\alpha$$-particle are equal. The ratio of their velocities is
NTA JEE Main 24th February 2021 Shift 2 - Question 17
According to Bohr atom model, in which of the following transitions will the frequency be maximum?
NTA JEE Main 24th February 2021 Shift 2 - Question 18
The logic circuit shown above is equivalent to:
NTA JEE Main 24th February 2021 Shift 2 - Question 19
Zener breakdown occurs in a $$p - n$$ junction having $$p$$ and $$n$$ both:
NTA JEE Main 24th February 2021 Shift 2 - Question 20
Given below are two statements:
Statement I: $$p - n$$ junction diodes can be used to function as a transistor, simply by connecting two diodes, back to back, which acts as the base terminal.
Statement II: In the study of transistors, the amplification factor $$\beta$$ indicates ratio of the collector current to the base current.
In the light of the above statements, choose the correct answer from the options given below.
