Physics · 2020 · 7 Jan · Shift 1
24 questions from this JEE Main paperGuest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
Physics · 2020 · 7 Jan · Shift 1
24 questions from this JEE Main paper
Atoms and Nuclei1 questionsDual Nature of Radiation1 questionsHeat and Thermodynamics3 questionsWork Power and Energy2 questionsCapacitor1 questionsElectromagnetic Waves1 questionsCurrent Electricity1 questionsElectronic Devices1 questionsRotational Motion2 questionsGeometrical Optics1 questionsAlternating Current1 questionsGravitation1 questionsWaves1 questionsElectrostatics1 questionsElectromagnetic Induction3 questionsWave Optics2 questionsCenter of Mass1 questions
- Q43.The time period of revolution of electron in its ground state orbit in a hydrogen atom is 1.6 10-16 s. The frequency of revolution of the electron in its first excited state (in s-1) is :Physics · Atoms and Nuclei · MCQ
- Q44.A beam of electromagnetic radiation of intensity 6.4 × 10–5 W/cm2 is comprised of wavelength, = 310 nm. It falls normally on a metal (work function = 2eV) of surface area of 1 cm2. If one in 103 photons ejects an elctron,…Physics · Dual Nature of Radiation · Numerical
- Q45.A litre of dry air at STP expands adiabatically to a volume of 3 litres. If = 1.40, the work done by air is : (31.4 = 4.6555) [Take air to be an ideal gas]Physics · Heat and Thermodynamics · MCQ
- Q46.A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m),… Includes diagramPhysics · Work Power and Energy · Numerical
- Q47.A parallel plate capacitor has plates of area A separated by distance 'd' between them. It is filled with a dielectric which has a dielectric constant that varies as k(x) = K(1 + x) where 'x' is the distance measured from one of… Includes diagramPhysics · Capacitor · MCQ
- Q48.If the magnetic field in a plane electromagnetic wave is given by = 3 10-8 sin(1.6 103x + 48 1010t) T, then what will be expression for electric field ?Physics · Electromagnetic Waves · MCQ
- Q49.The current I1 (in A) flowing through 1 resistor in the following circuit is : Includes diagramPhysics · Current Electricity · MCQ
- Q50.Which of the following gives a reversible operation?Physics · Electronic Devices · MCQ
- Q51.As shown in the figure, a bob of mass m is tied by a massless string whose other end portion is wound on a fly wheel (disc) of radius r and mass m. When released from rest the bob starts falling vertically. When it has covered a distance… Includes diagramPhysics · Rotational Motion · MCQ
- Q52.If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm, the focal length of the eye-piece, should be close to :Physics · Geometrical Optics · MCQ
- Q53.A LCR circuit behaves like a damped harmonic oscillator. Comparing it with a physical spring-mass damped oscillator having damping constant 'b', the correct equivalence would be:Physics · Alternating Current · MCQ
- Q54.A satellite of mass m is launched vertically upwards with an initial speed u from the surface of the earth. After it reaches height R (R = radius of the earth), it ejects a rocket of mass so that subsequently the satellite…Physics · Gravitation · MCQ
- Q55.Speed of a transverse wave on a straight wire (mass 6.0 g, length 60 cm and area of cross-section 1.0 mm2) is 90 ms-1. If the Young's modulus of wire is 16 1011 Nm-2, the extension of wire over its natural length is :Physics · Waves · MCQ
- Q56.Two infinite planes each with uniform surface charge density to are kept in such a way that the angle between them is 30o. The electric field in the region shown between them is given by : Includes diagramPhysics · Electrostatics · MCQ
- Q57.Two moles of an ideal gas with are mixed with 3 moles of another ideal gas with . The value of for the mixture is :Physics · Heat and Thermodynamics · MCQ
- Q58.A long solenoid of radius R carries a time (t) - dependent current I(t)=I0t(1 - t). A ring of radius 2R is placed coaxially near its middle. During the time interval 0 t 1, the induced current (IR) and the induced EMF(VR) in…Physics · Electromagnetic Induction · MCQ
- Q59.The radius of gyration of a uniform rod of length , about an axis passing through a point away from the centre of the rod, and perpendicular to it, is :Physics · Rotational Motion · MCQ
- Q60.A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the original intensity. Assuming that the polarizer - analyser set does not absorb any light, the angle by which the analyser…Physics · Wave Optics · MCQ
- Q61.Consider a circular coil of wire carrying constant current I, forming a magnetic dipole. The magnetic flux through an infinite plane that contains the circular coil and excluding the circular coil area is given by i. The magnetic…Physics · Electromagnetic Induction · MCQ
- Q62.A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the elevator is 4000 N, the speed of the elevator at full load is close to : (1 HP = 746 W, g = 10 ms-2)Physics · Work Power and Energy · MCQ
- Q63.A loop ABCDEFA of straight edges has six corner points A(0, 0, 0), B(5, 0, 0), C(5, 5, 0), D (0, 5, 0), E(0, 5, 5) and F(0, 0, 5). The magnetic field in this region is .…Physics · Electromagnetic Induction · Numerical
- Q64.Visible light of wavelength 6000 10-8 cm falls normally on a single slit and produces a diffraction pattern. It is found that the second diffraction minimum is at 60o from the central maximum. If the first minimum is produced at …Physics · Wave Optics · MCQ
- Q65.A non-isotropic solid metal cube has coefficients of linear expansion as : 5 10-5/oC along the x-axis and 5 10-6/oC along the y and the z-axis. If the coefficient of volume expansion of the solid is C 10-6/oC…Physics · Heat and Thermodynamics · Numerical
- Q66.Three point particles of masses 1.0 kg, 1.5 kg and 2.5 kg are placed at three corners of a right angle triangle of sides 4.0 cm, 3.0 cm and 5.0 cm as shown in the figure. The center of mass of the system is at a point: Includes diagramPhysics · Center of Mass · MCQ