Q27 of 31 Page 252

Observe the circuit and answer the questions given below.


i Are resistors 3 and 4 in series?


ii. Are resistors 1 and 2 in series


iii. Is the battery in series with any resistor?


iv. What is the potential drop across the resistor 3?


v. What is the total emf in the circuit if the potential drop across resistor 1 is 6V?

i. Yes, resistors 3 and 4 are in series as they are connected end to end.


ii. Yes, resistors 1 and 2 are in series.


iii. Yes, the battery is in series with resistors 1 and 2.


iv. Resistors 3 and 4 are in series and combination of both are in parallel with 2 so V3 + V4 = V2


V3 + 8 = 14


V3 = 6 V


So potential drop across resistor 3 is 6 V


v. Total emf = 14 + 6 = 20 V


More from this chapter

All 31 →
25

How can you appreciate the role of a small fuse in house wring circuit in preventing damage to various electrical appliances connected in the circuit?

 26

In the figure Q-26 the potential at A is ________ when the potential at B is zero.

 28

If the resistance of your body is 100000 Ω that would be the current that flows in your body when you touch the terminals of a 12V battery?

 29

A uniform wire of resistance 100 Ω melted and recast into wire of length doubles that of the original. What would be the resistance of the new wire formed?