Engineering Questions — JEE Main
409 solved questions with detailed explanations
Q.74. At 298 K, the molar conductivity of x% (w/w) MX solution (aqueous) is 123.5 S cm mol. The conductance of same solution is S. The value of x is ______ . (Given : cell constant = 1.3 cm; molar ma
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.4. Consider the system of linear equations in x, y, z :,,,Where is a differentiable function. If this system has infinitely many solutions for all , then f
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.21. Let A = {1, 2, 3, 4, 5, 6}. The number of one-one functions f: A A such that f(1) 3, f(3) 4 and f(2) + f(3) = 5, is
Q.25. The number of points, at which the function , , is not differentiable, is
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.3. If the system of linear equations : , , . has infinitely many solutions, then the value of equals.
Q.57. One half cell in a voltaic cell is constructed by dipping silver rod in solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of . A voltage of 1.60 V is measu