Part 2

A uniform wire of resistance R is shaped into a regular n−sided polygon (n is even), The equivalent resistance between any two corners can have. (i) the maximum value R/4 (ii) the minimum value R/n (iii) the minimum value R(n−1/n2) (iv) the minimum value R/n. A uniform wire of resistance R is shaped into a [...]

All the edges of a block with parallel faces are unequal. Its longest edge is twice its shortest edge. The ratio of the maximum to minimum resistance between parallel faces is. All the edges of a block with parallel faces are unequal. Its longest edge is twice its shortest edge. The ratio of the maximum [...]

n identical cells, each of emf ℰ and internal resistance r, are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The potential difference across each cell, except A, is are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The [...]

N identical cells, each emf E and internal resistance r are joined in series. Out of N cells, n cells are wrongly connected i.e., their terminals are connected in reverse of the required for series connection (n each emf E and internal resistance r are joined in series. Out of N cells n cells are [...]

The n rows each containing m cells in series are joined parallel. Maximum current is taken from this combination across an external resistance of 3Ω resistance. If the total number of cells used are 24 and internal resistance of each cell is 0.5Ω then The current i5 is December 1, 2020 Category: Cengage NEET by [...]

When an unknown resistance is connected across a series combination of two identical batteries, each of 1.5 V, the current through the resistor is 1.0 A. When it is connected across a parallel combination of the same batteries, the current through it is 0.6 A. The internal resistance of each battery is each of 1.5 [...]

The emf of a cell is ϵ and its internal resistance is r. Its terminals are connected to a resistance R. The potential difference between the terminals is 1.6 V for R=4Ω, and 1.8 V for R=9Ω. Then and 1.8 V for R=9Ω. Then The emf of a cell is ϵ and its internal resistance [...]

In the given circuit, the potential of the point E is In the given circuit the potential of the point E is December 1, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,

You are given several identical resistors each of value 10Ω and each capable of carrying a maximum current of 1 A. It is required to make a suitable combination of these to resistances to produce a resistance of 5Ω which can carry a current of 4 A. The minimum number of resistors required for this [...]

In the circuit shown, the current through the 4Ω resistors is 1amp when the points P and M are connected to a dc voltage source. The potential difference between the points M and N is. In the circuit shown the current through the 4Ω resistors is 1amp when the points P and M are connected [...]