What is the value of current \(I\) in the network shown below?

1.	\(2\) A	2.	\(3\) A
3.	\(4\) A	4.	\(7\) A

A current passes through a wire of variable cross-section in steady-state as shown. Then incorrect statement is:

The value of E (emf of the cell) in the circuit given below is:
  

Two cells of emf \(E\) and internal resistance \(r_1\) and \(r_2\) are connected in series through an external resistance \(R\). The value of \(R\) for which the potential difference across one of the cells becomes zero will be:

In the given circuit diagram, \(3\) identical bulbs are connected. If bulb \(B_3\) get fused suddenly, how will the brightness of bulbs \(B_1\) and \(B_2\) change?
              

What is the reading of the voltmeter of resistance \(1200~\Omega\) connected in the following circuit diagram? 

1. \(2.5\) V

2. \(5.0\) V

3. \(7.5\) V

4. \(40\) V

The dependence of resistivity \((\rho)\) on the temperature \((T)\) of a semiconductor is, roughly, represented by:

1.		2.
3.		4.

Current through the \(2~\Omega\)$$ resistance in the electrical network shown is:

A capacitor \(C\) is charged with the help of a resistance \(R\) as shown in the figure, Variation of \((V_{R}+V_{C})\) with time t is correctly shown in which of the options?
(\(V_{R}\) and \(V_{C}\) are instantaneous potential drops across \(R\) and \(C\) respectively).

1.		2.
3.		4.

Two batteries, one of emf \(18~\text{V}\) and internal resistance \(2~\Omega\) and the other of emf \(12\) V and internal resistance \(1~\Omega\), are connected as shown. Reading of the voltmeter is:
(if voltmeter is ideal)

1. \(14\) V
2. \(15\) V
3. \(18\) V
4. \(30\) V