NTA JEE Main 8th April 2023 Shift 2

Electric potential at a point $$P$$ due to a point charge of $$5 \times 10^{-9}$$ C is 50 V. The distance of $$P$$ from the point charge is:
(Assume, $$\frac{1}{4\pi\varepsilon_0} = 9 \times 10^9$$ N m$$^2$$ C$$^{-2}$$)

The equivalent resistance between A and B as shown in figure is:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Electromagnets are made of soft iron.
Reason R: Soft iron has high permeability and low retentivity.
In the light of above statements, choose the most appropriate answer from the options given below.

An emf of 0.08 V is induced in a metal rod of length 10 cm held normal to a uniform magnetic field of 0.4 T, when move with a velocity of:

The waves emitted when a metal target is bombarded with high energy electrons are

The width of fringe is 2 mm on the screen in a double slit experiment for the light of wavelength of 400 nm. The width of the fringe for the light of wavelength 600 nm will be:

In photoelectric effect
A. The photocurrent is proportional to the intensity of the incident radiation.
B. Maximum kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.
C. Max K.E. with which photoelectrons are emitted depends on the frequency of incident light.
D. The emission of photoelectrons require a minimum threshold intensity of incident radiation.
E. Max K.E. of the photoelectrons is independent of the frequency of the incident light.
Choose the correct option from the options given below:

A radio active material is reduced to $$\frac{1}{8}$$ of its original amount in 3 days. If $$8 \times 10^{-3}$$ kg of the material is left after 5 days the initial amount of the material is

For a given transistor amplifier circuit in CE configuration $$V_{CC} = 1$$ V, $$R_C = 1$$ k$$\Omega$$, $$R_b = 100$$ k$$\Omega$$ and $$\beta = 100$$. Value of base current $$I_b$$ is

The power radiated from a linear antenna of length $$l$$ is proportional to (Given, $$\lambda$$ = Wavelength of wave):