Find the ratio ofcurrents as measured by ammeter in two cases when the key is open and when the key is closed :

In the circuit shown, the reading of ammeter when switch S is open and when switch S is closed respectively are

Find the equivalent resistance of the network shown in the figure between the points A and B, when (a) the key is open (b) the key k is closed

In the figure shown is a R-L circuit connected with a cell of emf epsilon through a key k. If key k is closed find the current drawn by the battery (a) just after the key k is closed (b) long after the key k is closed

In the figure shown is a R-L circuit connected with a cell of emf epsilon through a key k. If key k is closed find the current drawn by the battery (a) just after the key k is closed (b) long after the key k is closed

In the circuit shown in Fig. 4.25, the voltmeter reads 1.5 V, when the key is open. When the key is closed, the voltmeter reads 1.35 V and ammeter reads 1.5 A. Find the emf and the internal resistance of the cell.

Name the pd between terminals of the cell when (i) key K is open (i) K is closed

In the given figure when the key is open the ammeter reading is 5 amp. What will be the ammeter reading when the key is closed

In the given figure when the key is open the ammeter reading is 5 amp. What will be the ammeter reading when the key is closed

In the given figure when the key is open the ammeter reading is 5 amp. What will be the ammeter reading when the key is closed

When the key is closed, a spark is generated between the ends of the rods. a. Explain the cause of the spark. b. Explain why a spark is also produced when the key is opened. c. Why are no sparks produced when the key is left closed?