Engineering Questions — Physics — Jee Main

Q.36. Two short electric dipoles A and B having dipole moment and respectively are placed with their axis mutually perpendicular as shown in the figure. The resultant electric field at a point x is

Q.42. An unpolarized light of certain intensity passes through a combination of two polarizers whose transmission axes are at and , respectively, with respect to the horizontal axis. A third polarize

Q.30. A lift of mass 1600 kg is supported by thick iron wire. If the maximum stress which the wire can withstand is and its radius is 4 mm, then maximum acceleration the lift can take is ________ . (

Q.39. Two identical long current carrying wires are bent into the shapes shown in the following figures. If the magnitude of magnetic fields at the centres P and Q of a semicircular arc are and resp

Q.37. For the given circuit (shown in part (A)) the time dependent input voltage and corresponding output are shown in part (B) and part (C), respectively. Identify the components that are used in t

Q.44. A body of mass 2 kg is moving along x-direction such that its displacement as function of time is given by , where , and . The work done on the body during the time interval to , is ..........

Q.35. One mole of diatomic gas having rotational modes only is kept is a cylinder with a piston system. The cross-section area of the cylinder is 4 cm². The gas is heated slowly to raise the temperatu

Q.45. A liquid drop of diameter 2 mm breaks into 512 droplets. The change in surface energy is J. The value of is _______ (Take surface tension of liquid = 0.08 N/m)

Q.31. A particle is rotating in a circular path and at any instant its motion can be described as . The angular acceleration of the particle after seconds is ____ rad/s.

Q.33. Heat is supplied to a diatomic gas at constant pressure. Then the ratio of is

Q.46. An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, mho/m. The ratio of maximum conducting current density to maximum displacement current density is _____

Q.37. A particle is executing simple harmonic motion. Its amplitude is A and time period is 5 sec. the time required by it to move from to is ____ sec.

Q.34. The temperature of a metal strip having coefficient of linear expansion is increased from T to T resulting in increase of its length by . The temperature is further increased from T to T, such

Q.29. The position of an object having mass kg as a function of time is given as m. At s, which of the following statements are correct? A. The linear momentum kg.m/s. B. The force acting on the

Q.27. Two cars A and B are moving in the same direction along a straight line with speeds 100 km/h and 80 km/h, respectively such that car A is moving ahead of car B. A person in car B throws a stone

Q.47. A vessel contains of a gas at pressure 8 bar and temperature 140°C with and . It is expanded adiabatically till pressure falls to 1 bar. The work done during this process is _______ kJ. (R is

Q.44. The ratio of momentum of the photons of the 1st and 2nd line of Balmer series of Hydrogen atoms is . The possible values of and are :-

Q.45. The output Y for the given inputs A and B to the circuit is: [Figure: Logic circuit diagram]

Q.36. Initial pressure and volume of a monoatomic ideal gas are P and V. The change in internal energy of this gas in adiabatic expansion to volume V_final = 27 V is J.

Q.26. Match the LIST-I with LIST-II List-I List-II A. Planck's constant I. MLT B. Stopping potential II. T C. Work function III. MLT D. Threshold frequency IV. MLTA Choose the correct answer from the