A bar magnet M is dropped so that if falls vertically through the coil C. The graph obtained for voltage produced acorss the coil vs time is shown in Fig.
(i) Explain the shape of the graph
(ii) Why is the negative peak longer than the positive peak?

A bar magnet M is dropped so that it falls vertically through the coil C. (Show in the figure). The graph obtained for voltage produced across the coil versus time is shown in the figure Why is the negative peak longer than the positive peak?

A short bar magnet is dropped through a coil of wire of similar length. Which one of the graphs below shows best how the current through the coil varies with time?

The current through the coil in figure (i) varies as shown in figure (ii). Which graph best shows the ammeter A reading as a function of time?

The current through the coil in figure (i) varies as shown in figure (ii). Which graph best shows the ammeter A reading as a function of time?

(a) Draw graph showing the variation of current versus voltage in an electroyte when an external resistance is also connceted. (b) (i) The graph between resistance (R ) and temperature (T) for Hg is shown in the figure (a). Explain the behaviour of Hg near 4k. (ii) In which region of the graph shown in the figure (b) is the resistance negative and why?

(a) Draw graph showing the variation of current versus voltage in an electroyte when an external resistance is also connceted. (b) (i) The graph between resistance (R ) and temperature (T) for Hg is shown in the figure (a). Explain the behaviour of Hg near 4k. (ii) In which region of the graph shown in the figure (b) is the resistance negative and why?

The magnetic flux through a coil varies with timet as shown in the diagram. Which graph best represents the variation of the e.m.f. E induced in the coil with time t?

Consider a box with three terminals on top of it as shown in figure. Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement A student performs an experiment in which any two of these three terminals are connected in the circuit shown in figure. The student obtains graphs of current-voltage characteristics for unknown combination of components between the two terminals connected in the circuit. The graphs are (i) When A is positive and B is negative (ii) When A is negative and B is positive (iii) When B is negative and C is positve (iv) When B is positive and C is neagtive (v) When A is positive and C is negative (vi) When A is negative and C is positive From these graphs of current - voltage characteristic shown in fig. (c) to (h) determine the arrangement of components between A, B and C.