# What is resistance in an electric circuit?

Resistance is the opposition to the flow of electric current through a conductor. It is defined as the ratio of the potential difference (volts) between the ends of the conductor to the magnitude of the current (amps) through the conductor.

### What is the resistance of a circuit?

The resistance of a circuit is the total opposition offered to the flow of electric current.

### Is the increase in voltage causes a greater electric resistance in a circuit?

No, the resistance in a circuit does not change when voltage changes. Resistance is an inherent property of the circuit.

### What is the resistance in a parallel circuit?

R=1/(1/ R1 +1/ R2 +1/ R3 +.........) Where R is the total external resistance(effective resistance) in an electric circuit.

### The electric force that makes current flow in a circuit is related to the what?

The electric force that makes current flow in a circuit is related to the resistance.

### When wires are connected to the terminals of a battery. what causes electric current in the circuit?

The resistance of the load is what causes an electric current to flow in a circuit.

### What effect does decreased resistance have on a circuit?

resistance is the opposition to the flow of an electric current, therefore the current will decrease as the resistance increases. Resistance also creates heat. This is how the light globes in a circuit light up.

### Why does an open electric circuit not make its elements function?

an opened circuit is considered to be possessed with an infinite resistance which totally opposes the flow of current in the circuit and ultimately makes the functioning of elements in the electric circuit subtle

### Is a gas stove a resistance in physical science?

No. By definition a resistor provides opposition to the flow of "energy" in a circuit. Electric stoves and ovens operate by using the heat generated by the resistance to electric flow provided by resisting elements in the circuit.

### What happens to the power of an electric circuit if the resistance is decreased?

if the resistance is decreased and the current stays the same, then the power decreases.

### Why the air gap between stator and armature of electric motor is kept small?

To minimise the reluctance of the magnetic circuit. 'Reluctance' opposes the formation of magnetic flux and is to a magnetic circuit, what 'resistance' is to an electric circuit.

### Comparison between electric and magnetic circuits?

Magnetic circuit follows equation (4) that is Ni = (Ф) ( l / μA) or m.m.f(magneto motive force) = (Flux) (reluctance). Electric circuit follows ohm's law that is E = I.R or e.m.f(electro motive force) = (current) (Resistance) From above point m.m.f in magnetic circuit is like as e.m.f in electrical circuit. Flux in magnetic circuit is similar as current in electrical circuit. Reluctance in magnetic circuit, S = ( l / μA) is similar… Read More

### If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V the current flowing through the circuit is?

..using the formula Voltage(V)=Current(I) * Resistance(R) .. we can get the result ...current will be 5 Ampere

### How does electric resistance affect electric charges?

In an electrical circuit ,, resistance is the force that resists the flow of electricity thru the circuit .. this is used in light bulbs to create the heat and light that we expect from the bulb .. and heat in a toaster fron the resistance in a wire making it hoy enough to cook the surface of the bread

### The resistance of an electric circuit is 12 ohms?

There is no question. Please restate the question.

### What is resistance reading?

A measurement of opposition to electric current flow in a component or circuit.

### Why is there no flow of electric current?

There are two possible causes: 1. The circuit has no Voltage applied to it. 2. The resistance of the circuit is INFINITE.

### If voltage constant when the current increases what does the resistance do?

In an electric circuit, ratio of current and voltage is constant which is known as the resistance of the circuit. If voltage or current is to be changed the resistance has to be changed. You cannot keep an invariable resistance in the circuit and increase current while keeping voltage as constant.Hence to vary the voltage or current in a circuit different equipments like rheostat,potentiometer are used.

### Device in an electric circuit that uses electrical energy as it interferes with the flow of electric charge?

That would be a resistor, a.k.a. a resistance.

### What ia a resistor?

A device used to control current in an electric circuit by providing resistance.

### What cause resistance in an electric circuit?

by the energy that it is giving by another molecule and the other energy.

### What can control the flow of electric current in a circuit?

By using variable resistance connected as a rheostat.

### What is the formula that measure the flow of an electric current through a circuit?

Current = Voltage / Resistance

### Why does the current in an electric circuit decrease when more bulbs are added?

Adding bulb means adding resistance. With increase in resistance, current decrease.

### What happens with electric current when applying the same voltage the resistance of the circuit is reduced?

As the resistance is reduced across the same voltage, the current increases.

### When do you get a short-circuit?

If the cables of the electric appliances is worn out or connected not properly,a short circuit may occured.The hort circuit has a very low resistance that almost all electric current flow through it.Owing to the heating effect,much heat will be generated when there's excess electric current.If there's no electric device like circuit breaker and fuse,a fire will be occured.

### How does electric current work?

Electric current is the rate of charge flow past a given point in an electric circuit, measured in Coulombs/second which is named Amperes. In most DC electric circuits, it can be assumed that the resistance to current flow is a constant so that the current in the circuit is related to voltage and resistance by Ohm's law. The standard abbreviations for the units are 1 A = 1C/s.

### 4 most important factors in an electric circuit?

electromotive force, current, resistance, and power

### The opposition to the flow of electrons in an electric circuit?

That is called resistance. The standard SI unit is the Ohm.

### What is an electric circuit with little or no resistance?

A: As current approaches infinity on a device it is known as a current source.

### As more branches are added to a parallel circuit the overall resistance of the circuit?

Elec tric current is a flow of electric charge that moves due to an 'electric pressure' called Elec tric current is a flow of electric charge that moves due to an 'electric pressure' called

### What are two factors that affect the amount of electric current in a wire?

V = I * R or I = ( V / R ) I = current (amps) V = Voltage R = Resistance The current in a circuit depends on the applied voltage and the resistance of the circuit.

### How will resistance change when voltage increases in an electric circuit if the current remains constant?

When the current remains constant, an increase in voltage will increase the resistance of the circuit. Answer Completely impractical question. None of the factors that affect resistance are mentioned so what you describe cannot happen!

### Why do you mean by short circuit?

A short circuit is a low resistance connection established by an accidental touching between a line supply and a grounded object in an electric circuit. The current will flow through the low resistance point, bypassing the rest of the circuit. When this happens the circuits over current device should open the circuit.

### Does current effect the resistance in an electric series circuit?

The resistance remains constant. The voltage would change, in accordance with Ohms' law, with a change in current.

### 8 If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V the current flowing through the circuit is?

There is a simple equation relating voltage (properly potential difference), current and resistance: V=IR Where V=potential difference, I=current and R=resistance So to answer: I=60/12 I=5

### What are the basic features of an electric circuit?

The basic features are Resistance Voltage and/or belive it or not current. Comment Actually, a circuit can exist without a voltage or a current!

### Why is there a lack of electric current?

Either because the voltage between the ends of the circuit is zero, or else because the resistance between the ends of the circuit is enormous.

### What are two ways to increase electric current in a simple circuit?

Most components will obey Ohm's Law: Voltage = (current) x (resistance). Rearranging to get Current = (Voltage) / (resistance), so if you increase the voltage, then current increases. Also decreasing the resistance at a constant voltage, more current will flow.

### Rate of flow of electric charge is measured in?

Electric current is the rate of charge flow past a given point in an electric circuit, measured in Coulombs/second which is named Amperes. In most DC electric circuits, it can be assumed that the resistance to current flow is a constant so that the current in the circuit is related to voltage and resistance by Ohm's law. The standard abbreviations for the units are 1 A = 1C/s.

### Why are resistance materials used in toasters?

Because the main purpose of a toaster is to radiate heat. In order to generate heat from electric current, resistance is required in the circuit.

### How will you differ a resistor and resistance?

resistance is the hindrance caused to some flow be it flow of liquids,flow of positive charges etc. whereas resistor is the device used to vary the resistance of the electric circuit

### What are the disadvantages of core and shell types construction?

The 'core' type is a magnetic circuit equivalent to an series electric circuit; a 'shell' type is equivalent to a parallel electric circuit. So, the reluctance (magnetic equivalent of resistance) will be lower for a shell type of similar cross-sectional

### Is electric circuit also called series circuit?

The 2 simplest Electrical circuits are Series Circuit - Same amount of current running through loads but voltage various by the resistance of the loads Parallel Circuit - Same voltage on the different loads by subject to the load resistance, the current passing through is different

### If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V the current flowing through tje circuit is?

I = V / R = 60 / 12 = 5 ohms 5 Amps

### Advantages of heating effect of electric current?

Reliable, simple and safe. Heat can be regulated by changing the resistance in the circuit.

### How does a switch control the current flow in an electric circuit?

A switch interrupts or allows the flow of current. When it is closed it essentially has zero resistance and when open it essentially has infinite resistance.

### What is the amperage in an electric circuit when the voltage 120 volts and the resistance is 40 ohms?

Ohm's Law states Voltage = Current x Resistance. You rewrite the equation as Current = Volts / Resistance to solve for current.

### Why does an electric circuit get hot and melt the wires?

It is drawing more current than it is designed for. This is usually due to a short circuit, a component that fails in a mode where resistance is decreased.