PhysicsHardHigh School (11–12)Electricity & Magnetism › Electromagnetic InductionElectricity & Magnetism › Current ElectricityNEETAPA-LevelIB
Created by StemPy LabA coil carries a steady current. The battery is cut out and the current dies away through a resistor. The current falls to one eighth of its starting value in s. What is the time constant?
← All Quizzes
← A battery is switched across an inductor that has a resistor in series with it. How does the rate of growth of the current, dI/dt, change from the instant of closing to a long time later?Think about these statements. (i) The emf in a turning generator coil is zero when its plane is at right angles to the field. (ii) In an LR circuit the current jumps at once to mathcalE/R when the switch is closed. (iii) A frame that moves wholly inside a uniform field feels no force from the field. (iv) A rod falling on rails with a resistor reaches a terminal speed. How many of them are correct? →
Discussion (0)
Log in to join the discussion.
Loading…