A network of resistors is connected to a 16 V battery with an internal resistance of $1 \Omega$, as shown in the figure. The voltage drop across AB is:

1. 2 V

2. 25 V

3. 4 V

4. 6 V

A battery of 10 V and negligible internal resistance is connected across the diagonally opposite corners of a cubical network consisting of 12 resistors each of resistance $1 \Omega$ (as shown in the figure). The total current in the network is:

$1. 6 A$
$2. 12 A$
$3. 4 A$
$4. 2 A$

The current in the branch AB in the given network is:

 
1. 5/8 A

2. 5/2 A

3. 15/8 A

4. 3/2 A

The four arms of a Wheatstone bridge have the following resistances as shown in the figure. A galvanometer of 15Ω resistance is connected across BD. What is the current through the galvanometer when a potential difference of 10 V is maintained across AC?

1. 4.87 mA

2. 3.72 mA

3. 5.01 mA

4. 2.65 mA

In a meter bridge (shown in the figure), the null point is found at a distance of 33.7 cm from A. If now a resistance of 12 $\Omega$ is connected in parallel with S, the null point occurs at 51.9 cm. The values of R and S are respectively:

$1. 13.5 \Omega , 6.86 \Omega$
$2. 13.5 \Omega , 13.5 \Omega$
$3. 6.86 \Omega , 6.86 \Omega$
$4. 6.86 \Omega , 13.5 \Omega$

A resistance of $R \Omega$ draws current from a potentiometer. The potentiometer has a total resistance $R_0 \Omega$  (as shown in the figure). A voltage V is supplied to the potentiometer. What is the voltage across R when the sliding contact is in the middle of the potentiometer?

$1. \frac{2VR}{R_0+4R}$
$2. \frac{VR}{R_0+4R}$
$3. \frac{2VR}{R_0+2R}$
$4. \frac{VR}{R_0+2R}$

A light bulb is rated at 100 W for a 220 V supply, the resistance of the bulb is:

$1. 423 \Omega$
$2. 440 \Omega$
$3. 444 \Omega$
$4. 484 \Omega$

Which one of the following is correct?

A network of resistors is connected to a 16 V battery with an internal resistance of $1 \Omega$, as shown in the figure. The current in $1 \Omega$ resistor between B and C will be:

$1. 4 A$
$2. 2 A$
$3. 1 A$
$4. 3 A$

A network of resistors is connected to a 16 V battery with an internal resistance of $1\Omega$, as shown in the figure. The equivalent resistance of the network is:

$1. 4\Omega$
$2. 5\Omega$
$3. 7\Omega$
$4. 2\Omega$