16 The potentiometer wire plays equivalent role of which of these devices in a circuit?
17 The reason we can read print from any direction is that
the white part of a page reflects light in all directions
letters emit black light in all directions.
letters absorb black light from all directions.
all of the above
18 In an experiment, potential difference is plotted on the vertical axis and current on the horizontal axis. The slope of the graph represents
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