Table of Contents

## Can there be current without voltage?

Voltage is the Cause, Current is the Effect Voltage attempts to make a current flow, and current will flow if the circuit is complete. It is possible to have voltage without current, but current cannot flow without voltage.

## How do you calculate total current?

What is the formula for a total current? IT = VT/RT or I total = V total / R total or the total current = the total voltage / the total resistance.

**What is the mathematical relationship between current and resistance?**

This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. In other words, if we increase the voltage, then the current will increase. But, if we increase the resistance, then the current will decrease.

**What is the formula for voltage if the given is current and resistance?**

Ohm’s law defines the relationship between the voltage, current, and resistance in an electric circuit: i = v/r. The current is directly proportional to the voltage and inversely proportional to the resistance.

### How do you measure electric current?

The electric current in one part of a circuit is measured with an ammeter, which gives a reading in ampere. To take the measurement, a gap is made in the circuit and the ammeter is connected into that gap, so that the charged particles moving around the circuit must pass through the meter.

### Why is there current but no voltage?

You are talking of a situation such as a shorted out battery. If the wire (or whatever you use to make the short circuit), has zero resistance, then placing a volt meter across the battery terminals will show no voltage, although a current flows through the wire.

**Why do I have voltage but no amperage?**

The most common cause of no amperage is a bad contact somewhere between the rectifier and the load. This can be in the buswork, at the saddle, or even where the anodes sit on the bar. If the voltage at the tank is within 5% of the rectifier’s voltage, then it is unlikely that you have a connection issue.

**How do you find resistance in a parallel circuit?**

You can find total resistance in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +… If one of the parallel paths is broken, current will continue to flow in all the other paths.