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?
              

1.	Brightness of bulb \(B_1\) will increase whereas brightness of bulb \(B_2\) will decrease
2.	Brightness of bulb \(B_2\) will increase whereas brightness of bulb \(B_1\) will decrease
3.	Brightness of both bulbs \(B_1\) and \(B_2\) will increase
4.	Brightness of bulb \(B_1\) will increase whereas brightness of bulb \(B_2\) will remain the same

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

A current of \(2\) A is to be sent through a resistor of \(5 ~\Omega.\) Number of cells required in series, if each has emf \(2\) V and internal resistance \(0.5~\Omega,\) are:
1. \(40\)
2. \(30\)
3. \(20\)
4. \(10\)

A \(50\) kW dc generator produces a potential difference of \(250\) V. If the resistance of the transmission line is \(1~\Omega\), what percentage of the original power is lost during transmission?
1. \(80\%\)
2. \(40\%\)
3. \(20\%\)
4. \(10\%\)

A potential divider is used to give outputs of \(2~\text{V}\) and \(3~\text{V}\) from a \(5~\text{V}\) source, as shown in the figure.

Three voltmeters are connected as shown.

A potential difference is applied between \(\mathrm{A}\) and \(\mathrm{B}\). On closing the switch \(\mathrm{S}\), readings of voltmeter (s):