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Liono4ka [1.6K]
3 years ago
13

Why might the amount of current and voltage in a circuit need to be juggled

Physics
1 answer:
alexandr402 [8]3 years ago
5 0
In reality the voltage of a circuit is changed to maintain a certain amount of current passing through a circuit. Voltage is directly proportional to current. On reducing the voltage, the current flow will decrease, if we consider the resistance of the circuit is remaining same. Depending on the demand, the voltage is changed and the current automatically gets changed.
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The mass of the banana is m and it is at height h.

Applying the Law of Conservation of Energy

              Total Energy before fall = Total Energy after fall

                                E_{i}  = E_{f}

Here, total energy is the sum of kinetic energy and potential energy

K.E_{i} + P.E_{i} = K.E_{f} + P.E_{f}       (a)

When banana is at height h, it has

                 K.E_{i} = 0    and    P.E_{i} = mgh          

and when it reaches the river, it has

       K.E_{f}  = 1/2mv^{2}    and   P.E_{f}  = 0

Putting the values in equation (a)

                              0 + mgh = 1/2mv^{2} + 0

                                      mgh = 1/2mv^{2}

<em>cutting 'm' from both sides</em>

<em>                                           </em>gh = 1/2v^{2}

                                          v = \sqrt{2gh}

Hence, the velocity of banana before hitting the water is

                                          v = \sqrt{2gh}

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