JEE Main - Physics Mock Tests

According to Bohr's model, the radius of the nth orbit in a hydrogen-like atom is proportional to: (Z is the atomic number)

In a series LCR circuit, R = 100 Ω, Xₗ = 200 Ω and Xc = 100 Ω. The impedance of the circuit is:

A force of 10 N acts on a body of mass 1 kg for 3 s, initially at rest. The work done by the force is:

A conducting rod moves perpendicular to a magnetic field B with velocity v. The induced emf across its ends (length l) is:

In a Young's double slit experiment, the separation between the slits is 0.5 mm and the screen is 1.0 m away. A monochromatic light of wavelength 500 nm is used. A thin glass plate of refractive index 1.5 and thickness 0.02 mm is placed in front of one of the slits. The number of fringes by which the pattern shifts is closest to:

An infinite series of identical resistors each of resistance R is connected as follows: one resistor R is connected in series with a parallel combination of resistor R and the rest of the infinite series. The equivalent resistance of the network is:

In a meter bridge, an unknown resistance X is in the left gap and a resistance of 8 ohm is in the right gap. The null point is at 60 cm from the left end. If a resistance of 6 ohm is now connected in parallel with X, the null point shifts to 50 cm. The value of X is:

A compound microscope has an objective of focal length 2 cm and an eyepiece of focal length 5 cm. The object is placed 2.5 cm from the objective and the final image is formed at infinity. The magnifying power of the microscope (least distance of distinct vision = 25 cm) is: