741 Two parallel beams of positrons moving in the same direction will________? Physics Medium Full question → A repel each other B not interact with each other C attract each other D be deflected normal to the plane containing the two beams.
742 An emf of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 to 2 ampere in 1 millisecond. The value of self inductance is_______? Physics Medium Full question → A zero B 5 H C 5000 H D 5 mH
743 The core of a transformer is laminated to reduce energy losses due to__________? Physics Medium Full question → A Eddy currents B Hysteresis C Resistance in winding D None of these
744 Which of the following is true ? Physics Medium Full question → A Lyman series is a continuous spectrum. B Paschen series is a line spectrum in the infra red. C Balmer series is a line spectrum in the ultraviolet. D the spectral series formula can be derived from the Rutherford model of the hydrogen atom.
745 Electric current in a solid metal conductor is caused by the movement of what ? Physics Medium Full question → A Protons B Electrons C Metal atoms D Metal ions
746 A force On particle is conservative if:________? Physics Medium Full question → A It’s works equals the change in the kinetic energy of the particle. B It’s obeys Newton’s second law C It’s obeys Newton’s third law D It work depends on the end points of every motion, not on the path between .
747 A Stone thrown from the top of a tall building follows a path that is: Physics Medium Full question → A Circular B Made of two straight line segments C Hyperbolic D Parabolic
748 The speed of light will be minimum while passing through ? Physics Medium Full question → A Vaccum B Glass C Water D Air
749 Farad is the unit of___________? Physics Medium Full question → A inductance B voltage C capacitance D None of these
750 The efficiency of the Carnot engine working between 150°C and 50°C is__________? Physics Medium Full question → A 50% B 100% C 23.6% D 29.4%
751 Which instrument is suitable to measure the internal diameter of a test tube? Physics Medium Full question → A Vernier Callipers B Screw Gauge C Bore Gauge D None
752 A force applied on a body through the string is called_________? Physics Medium Full question → A Weight B Momentum C Tension D Torque
753 Gravitation force of moon is_________? Physics Medium Full question → A 7.2 m/s² B 1.62 m/s² C 9.8 m/s² D 3.75 m/s²
754 Gravitation force of sun is__________? Physics Medium Full question → A 274 m/s² B 362 m/s² C 300 m/s² D None of these
755 Gravitation force of earth is___________? Physics Medium Full question → A 9.80 m/s² B 7.21 m/s² C 1.62 m/s² D None of these
756 The centripetal acceleration produced in a rotating body is commonly due to change on_________of body? Physics Medium Full question → A magnitude B direction C both D None of these
757 The mass-energy relation is the outcome of____________? Physics Medium Full question → A Quantum theory B General theory of relativity C Special theory of relativity D None of these
758 Mach number is used in connection with the speed of___________? Physics Medium Full question → A Ship B Light C Sound D aircraft
759 Rutherford in his atomic model could not explain behavior of ___________ ? Physics Medium Full question → A Electrons B Protons C Neutrons D Neutrino
760 Joule Thomson effect is based upon __________ ? Physics Medium Full question → A Sudden compression of gases B Sudden expansion of gases C Cooling of gases D Heating of gases