In the circuits shown below, the readings of the voltmeters and the ammeters will be:

 

1.	\(V_2>V_1~\text{and}~i_1= i_2\)	2.	\(V_2=V_1~\text{and}~i_1> i_2\)
3.	\(V_2=V_1~\text{and}~i_1= i_2\)	4.	\(V_2>V_1~\text{and}~i_1> i_2\)

Which of the following acts as a circuit protection device?

Kirchhoff’s first and second laws for electrical circuits are consequences of:

The power dissipated across the \(8~\Omega\) resistor in the circuit shown here is \(2~\text{W}\). The power dissipated in watts across the \(3~\Omega\) resistor is:
       

Two cells having the same emf, are connected in series through an external resistance R. Cells have internal resistance r₁ and r₂ respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is:

1. $r_1-r_2$

2. $\frac{r_1+r_2}{2}$

3. $\frac{r_1-r_2}{2}$

4. $r_1+r_2$

Three resistances \(\mathrm P\), \(\mathrm Q\), and \(\mathrm R\), each of \(2~\Omega\) and an unknown resistance \(\mathrm{S}\) form the four arms of a Wheatstone bridge circuit. When the resistance of \(6~\Omega\) is connected in parallel to \(\mathrm{S}\), the bridge gets balanced. What is the value of \(\mathrm{S}\)?

The total power dissipated in watts in the circuit shown below is:

A current of \(3~\text{A}\) flows through the \(2~\Omega\) resistor shown in the circuit. The power dissipated in the \(5~\Omega\) resistor is: