NTA JEE Main 25th January 2023 Shift 2

Match List I with List II
A. Troposphere       I. Approximate 65-75 km over Earth's surface
B. E-Part of Stratosphere      II. Approximate 300 km over Earth's surface
C. F$$_2$$-Part of Thermosphere    III. Approximate 10 km over Earth's surface
D. D-Part of Stratosphere     IV. Approximate 100 km over Earth's surface
Choose the correct answer from the options given below :

A point charge of 10 $$\mu$$C is placed at the origin. At what location on the X-axis should a point charge of 40 $$\mu$$C be placed so that the net electric field is zero at $$x = 2$$ cm on the X-axis?

The resistance of a wire is 5 $$\Omega$$. Its new resistance in ohm, if stretched to 5 times of its original length will be:

For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10 mA is passed through it. If the torsional constant of suspension wire is $$4.0 \times 10^{-5}$$ N m rad$$^{-1}$$, the magnetic field is 0.01 T and the number of turns in the coil is 200, the area of each turn (in cm$$^2$$) is:

A wire of length 1 m moving with velocity 8 m s$$^{-1}$$ at right angles to a magnetic field of 2 T. The magnitude of induced emf, between the ends of wire will be _____.

Match List I and List II
A. Gauss's Law in Electrostatics        I. $$\oint \vec{E} \cdot d\vec{l} = -\frac{d\phi_B}{dt}$$
B. Faraday's Law                          II. $$\oint \vec{B} \cdot d\vec{A} = 0$$
C. Gauss's Law in Magnetism        III. $$\oint \vec{B} \cdot d\vec{l} = \mu_0 i_c + \mu_0 \epsilon_0 \frac{d\phi_E}{dt}$$
D. Ampere-Maxwell Law          IV. $$\oint \vec{E} \cdot d\vec{s} = \frac{q}{\epsilon_0}$$
Choose the correct answer from the options given below :

The light rays from an object have been reflected towards an observer from a standard flat mirror, the image observed by the observer are:-
A. Real
B. Erect
C. Smaller in size than object
D. Laterally inverted
Choose the most appropriate answer from the options below:

Given below are two statements:
Statement I: Stopping potential in photoelectric effect does not depend on the power of the light source.
Statement II: For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light.
In the light of above statements, choose the most appropriate answer from the options given below.

The energy levels of an atom is shown in figure.

Which one of these transitions will result in the emission of a photon of wavelength 124.1 nm?
Given ($$h = 6.62 \times 10^{-34}$$ J s)

Statement I: When a Si sample is doped with Boron, it becomes P type and when doped by Arsenic it becomes N-type semi conductor such that P-type has excess holes and N-type has excess electrons.
Statement II: When such P-type and N-type semi-conductors, are fused to make a junction, a current will automatically flow which can be detected with an externally connected ammeter.
In the light of above statements, choose the most appropriate answer from the options given below.