Engineering Questions — Physics
155 solved questions with detailed explanations
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
Q.42. An infinitely long straight wire carrying current I is bent in a planer shape as shown in the diagram. The radius of the circular part is r. The magnetic field at the centre O of the circular lo
Q.28. The total length of potentiometer wire AB is 50 cm in the arrangement as shown in figure. If P is the point where the galvanometer shows zero reading then the length AP is .......... cm. [Figure
Q.35. Match List-I with List-II.List-I: A. , B. , C. , D. . List-II: I. Periodic with time period but not simple harmonic motion (SHM), II. Periodic with time period but Not SHM, III. periodic with
Q.44. Assuming the experimental mass of as 12u, the mass defect of atom is MeV/c². (Mass of proton = 1.00727u, mass of neutron = 1.00866 u, 1 u = 931.5 MeV/c² and c is the speed of the light in vacu
Q.42. A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm carrying a current of 2 A. The magnetic energy stored inside the cube is J. The value of is ( Tm/A, )
Q.46. A diode has Zener voltage of 10V and maximum power dissipation of 0.5W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25V power supply is
Q.45. As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface. If refractive index of the material of prism is , the angle of
Q.30. The height in terms of radius of the earth (R), at which the acceleration due to gravity becomes where g is acceleration due to gravity on earth's surface, is