Question

Рассчитайте силу тока при коротком замыкании батареи с ЭДС 9В, если при замыкании ее на внешнее сопротивление 3 Ом ток в цепи равен 2А

Answer 1

Дано:

Е = 9 В

R = 3 Ом

I = 2 А

__________

Iкз - ?

 

Решение: ток короткого замыкания Iкз = Е/r

по закону Ома для полной цепи I = E / (R+r), откуда r = E/I-R = 9/2-3 = 1,5 Ом

Iкз = 9/1,5 = 6 А

Answer 2

Calculation of Current in a Short-Circuited Battery

To calculate the current in a short-circuited battery, we can use Ohm's Law, which states that the current flowing through a conductor is equal to the voltage across the conductor divided by the resistance of the conductor.

In this case, we have a battery with an electromotive force (EMF) of 9V and a short circuit created by connecting it to an external resistance of 3Ω. The current flowing through the circuit is given as 2A.

Using Ohm's Law, we can calculate the current in the short-circuited battery as follows:

Current (I) = Voltage (V) / Resistance (R)

Since the battery is short-circuited, the resistance is effectively zero. Therefore, the current can be calculated as:

Current (I) = Voltage (V) / Resistance (R) = 9V / 0Ω = ∞

The current in the short-circuited battery is infinite.

Please note that in practical scenarios, a short circuit can cause excessive current flow, leading to potential hazards such as overheating, damage to the battery, or even fire. It is important to handle electrical circuits safely and avoid short circuits.