A carbon resistor of (47 ± 4.7) k is to be marked
with rings of different colours for its identification. The colour code sequence will be
A set of 'n' equal resistors, of value 'R' each, are
connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10 I. The value of 'n' is
A battery consists of a variable number 'n' of
identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n ?