Engineering Questions — Physics — Jee Main
148 solved questions with detailed explanations
Q.30. A planet (P) is moving around the star of mass in the orbit of radius . Another planet (P) is moving around another star of mass in a orbit of radius . Ratio of time periods of revolution of P
Q.33. A slit of width a is illuminated by light of wavelength . The linear separation between and minima in the diffraction pattern produced on a screen placed at a distance D from the slit system i
Q.27. The potential energy of a particle changes with distance from a fixed origin as where and are constant with appropriate dimensions. The dimension of are ________.
Q.39. A current carrying circular loop of radius 2 cm with unit normal \hat{n} = \frac{\hat{k}+\hat{i}}{\sqrt{2}} is placed in a magnetic field, B=B₀(3i+2k). If B₀ = 4 × 10⁻³ T and current I=100\sqrt{
Q.39. A solenoid has a core made of material with relative permeability 400. The magnetic field produced in the interior of solenoid is 1.0T. The magnetic intensity in SI units is . The value of is _
Q.32. The graph shows variation of stopping potential with the frequency of the incident radiation for three photosensitive metals , , and . Which metal will give out electrons with greater kinetic
Q.33. A liquid of density 600 kg/m³ flowing steadily in a tube of varying cross-section. The cross-section at a point A is 1.0 cm² and that at B is 20 mm². Both the points A and B are in same horizont
Q.37. From the circuit given below, the capacitance between terminals A and B shown in the circuit is __________ . (take and .)
Q.49. The stored charge in the capacitor in steady state of the following circuit is μC. [Figure: Circuit diagram]
Q.48. A particle having electric charge C and mass kg is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is m. The value of is .
Q.50. A certain gas is isothermally compressed to rd of its initial volume ( litre) by applying required pressure. If the bulk modulus of the gas is N/m, the magnitude of work done on the gas is ____
Q.47. Some distance star is to be observed by some telescope of diameter of objective lens a, at an angular resolution of 3.0 × 10⁻⁷ radian. If the wavelength of light from the star reaching the teles
Q.48. Two identical small bar magnets each of dipole moment J/T are placed at a center to center separation of 10 cm, with their axes perpendicular to each other as shown in figure. The value of magn
Q.34. A spherical liquid drop of radius R acquires the terminal velocity v₁ when falls through a gas of viscosity η. Now the drop is broken into 64 identical droplets and each droplet acquires termina
Q.47. Using Bohr's model, calculate the ratio of the magnetic fields generated due to the motion of the electrons in the and orbits of hydrogen atom. ______
Q.50. A circular loop of radius 20 cm and resistance is placed in a time varying magnetic field T. At t = 0, for the plane of the loop being perpendicular to the magnetic field and, the induced curre
Q.29. Two nuclei of mass number 3 combine with another nucleus of mass number 4 to yield a nucleus of mass number 10. If the binding energy per nucleon for the mass number 3, 4 and 10 are 5.6 MeV, 7.4
Q.49. A three coulomb charge moves from the point (0, -2, -5) to the point (5, 1, 2) in an electric field expressed as N/C. The work done in moving the charge is ________ J.
Q.49. A uniform wire of length of weight is suspended from the roof with a weight of at the other end. The stress in the wire at distance from the top is where, A is the cross sectional area of t
Q.34. An ideal gas at pressure P and temperature T is expanding such that . The coefficient of volume expansion of the gas is