Engineering Questions — Physics
138 solved questions with detailed explanations
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