Calculating Current Flow:
To calculate the current flowing through horizontal 2ohm when a 6V battery is connected across terminals 1 and 2, we need to use Ohm's Law, which states that current is equal to voltage divided by resistance.

Ohm's Law:
I = V/R

Where:
I = Current (in amperes)
V = Voltage (in volts)
R = Resistance (in ohms)

Using Ohm's Law:
- Voltage across the horizontal 2ohm resistor is 6V, as it is connected across the same terminals as the battery.
- Resistance of the horizontal 2ohm resistor is 2ohms.
- Using Ohm's Law, we can calculate the current flowing through the horizontal 2ohm resistor as follows:
I = V/R
I = 6/2
I = 3 amperes

Explanation:
When a 6V battery is connected across terminals 1 and 2, the voltage across the horizontal 2ohm resistor is also 6V. As the horizontal 2ohm resistor has a resistance of 2ohms, we can use Ohm's Law to calculate the current flowing through it. The current is found to be 3 amperes. This means that 3 amperes of current flows through the horizontal 2ohm resistor when a 6V battery is connected across terminals 1 and 2.

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