As we already know that in a step-up transformer, if voltage increases, the current decreases where power is same (as transformer only step-up or step-down the value of current and voltage and doesn’t change the value of power). Similarly, voltage decreases when current increases in a step-down transformer.

If you increase the resistance of the load of constant current supply, the voltage will drop proportional to the change in resistance.

The increase in current will cause an increase in voltage loss across the cells of the battery and therefore there will be a little voltage less at the terminals. According to the Ohm’s law, voltage means current times resistance.

The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.

The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit. The greater the battery voltage (i.e., electric potential difference), the greater the current.

Technically we can say that if current is proportional to voltage then voltage is also proportional to current but Mathematically we cannot because of ohm’s law. Ohm’s law says that “the current through a conductor between two points is directly proportional to the voltage across the two points.”

High voltage transmission minimizes the amount of power lost as electricity flows from one location to the next. The higher the voltage, the lower the current. The lower the current, the lower the resistance losses in the conductors. And when resistance losses are low, energy losses are low also.

No, it’s the current that kills you. It kills you by putting a current signal through your heart, which interferes with its normal operation. The high voltage is necessary to penetrate the skin.

Electricity is transmitted at high voltages (66 kV or above) to reduce the energy loss which occurs in long-distance transmission. Power is usually transmitted through overhead power lines.

An electrical current at 1,000 volts is no more deadly than a current at 100 volts, but tiny changes in amperage can mean the difference between life and death when a person receives an electrical shock. Of the two, amperage is what creates the greatest risk.

The human body has an inherent high resistance to electric current, which means without sufficient voltage a dangerous amount of current cannot flow through the body and cause injury or death. As a rough rule of thumb, more than fifty volts is sufficient to drive a potentially lethal current through the body.

Electric shock feeling in the head, also referred to as brain zaps, brain shivers, head shocks, and head zaps have three main causes:

• Side effects of medication.
• Withdrawing from medication.
• Chronic stress (hyperstimulation), including the stress caused by anxiety.