How many electrons per second constitute a current of one micro ampere?
A. one electron B. 10 –6 electrons C. 106 electrons D. 6.25 × 1012 electrons
A. one electron B. 10 –6 electrons C. 106 electrons D. 6.25 × 1012 electrons
A. The resistance of each of them increases. B. The resistance of each of them decreases. C. The resistance of copper decreases and that of germanium increases. D. The resistance…
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.
A. Eddy currents B. Hysteresis C. Resistance in winding D. None of these
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…
A. Protons B. Electrons C. Metal atoms D. Metal ions
A. Quantum theory B. General theory of relativity C. Special theory of relativity D. None of these
A. Ship B. Light C. Sound D. aircraft