An infinite ladder is constructed with 1 ohm and 2ohm resistors as shown in figure. Find the effective resistance between the points A and B.

Q. An infinite ladder is constructed with 1 ohm and 2 ohm resistors as shown in figure. Find the effective resistance between the points A and B.
Current Electricity
(a) 2.5 Ω
(b) 1 Ω
(c) 3 Ω
(d) 2 Ω
Ans: D

Figure shows a part of an electric circuit. The potentials at the points a, b and c are 30V, 12V and 2V respectively. Find the currents through the three resistors.

Q. Figure shows a part of an electric circuit. The potentials at the points a, b and c are 30V, 12V and 2V respectively. Find the currents through the three resistors.
Current Electricity
(a) 1A , 0.4A, 0.6A
(b) 1A , 1A, 0.6A
(c) 2A , 0.4A, 1A
(d) 1A , 2A , 0.2A
Ans: A

A wire of resistance 15 ohm is bent to form a regular hexagon ABCDEFA. Find the equivalent resistance of the loop between the points A and B

Q. A wire of resistance 15 ohm is bent to form a regular hexagon ABCDEFA. Find the equivalent resistance of the loop between the points A and B
(a) 2.5 Ω
(b) 2.08 Ω
(c) 2.7 Ω
(d) 1.99 Ω
Ans: B

If the reading of ammeter A1 in figure is 2.4 A .What willthe ammeters A2 and A3 read? Neglect the resistances of the ammeters.

Q. the reading of ammeter A1 in figure is 2.4 A .What ill the ammeters A2 and A3 read ?Neglect the resistances of the ammeters.
Current Electricity
(a) 1×2A, 4A
(b) 1×2A, 3A
(c) 1×6A, 4A
(d) 1×6A, 3A