Resistances 1 Ω, 2 Ω and 3 Ω are connected to form a triangle. If a 1.5 V cell of negligible internal resistance is connected across the 3 Ω resistor, the current flowing through this resistor will be

Question

Resistances 1 Ω, 2 Ω and 3 Ω are connected to form a triangle. If a 1.5 V cell of negligible internal resistance is connected across the 3 Ω resistor, the current flowing through this resistor will be (A) 0.25 A (B) 0.5 A (C) 1.0 A (D) 1.5 A

Tardigrade Admin · Accepted Answer

Here resistors 1 and 2 in series and combine (1,2) in parallel with 3. So, potential across (1,2) and 3 will be same i.e 1.5 V Thus, current through 3 Ω=(1.5/3)=0.5 A

Q. Resistances $1 Ω, 2 Ω$ and $3 Ω$ are connected to form a triangle. If a $1.5 V$ cell of negligible internal resistance is connected across the $3 Ω$ resistor, the current flowing through this resistor will be

0.25 A

0.5 A

1.0 A

1.5 A

Here resistors $1$ and $2$ in series and combine $(1, 2)$ in parallel with $3$ .
So, potential across $(1, 2)$ and $3$ will be same i.e $1.5 V$
Thus, current through $3 Ω = \frac{1.5}{3} = 0.5 A$

Q. Resistances 1Ω,2Ω and 3Ω are connected to form a triangle. If a 1.5V cell of negligible internal resistance is connected across the 3Ω resistor, the current flowing through this resistor will be