How will the reading of ammeter and voltmeter be affected if the length of the resistance wire is doubled with same thickness?

when the length of the wire is doubled then the ammeter reading decreases..

What happens to the current when the length of wire is doubled?

So, the new resistance, after doubling the length of the wire, becomes twice of the original resistance. Hence, if the length of a wire is doubled, then its resistance becomes doubled. Note: We must not get confused as to why the area of the cross section of the wire is taken to be constant.

How does the length of wire affect the current in the circuit?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. When all other variables are the same, charge will flow at higher rates through wider wires with greater cross-sectional areas than through thinner wires.

What happens to the ammeter reading when the length of the wire is doubled?

If the length of the wire is doubled then the resistance of the wire will also double. Hence, the Current will decrease to one half.

Why does the ammeter reading decreases?

The ammeter gives the value of current flowing in the whole circuit since the components are connected in series. For the current in the circuit (ammeter reading) to decrease, the total resistance in the circuit should increase. The resistance of the fixed resistor on the left cannot be increased.

What are the changes observed in the ammeter reading?

(a) (i) The ammeter reading will decrease (become shalt). This is because with the increase in length, resistance of the circuit increases, hence current decreases. (ii) The ammeter reading will increase (becomes two times). This is because as area increases, resistance decreases and hence current increases.

What happens to current If area is doubled?

when the length of the wire is doubled the area of crossection decrases by half (usually). Thus the resistance increases by 4 times. Since resistance is indirectly proportional to current the current flowing will reduce four times.

What happens to the resistivity of the conductor if its length is doubled?

Answer: the resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa. so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.

Does wire length affect amperage?

The current carrying capacity of a wire does not change with its length. Yes. The longer the distance, the lower the the gauge (larger diameter), to maintain the service voltage at the point of load.

When electron moves in a wire then?

Electrons move through a wire from the negative end to the positive end. The resistor uses the energy of the electrons around the wire and slows down the flow of electrons. A battery is one way to generate electric current.

Why does ammeter reading decrease after some time?

In series the ammeter reading will drop because Vt/Rt=It, in series adding the resistors increases the total value of total resistance resulting in It being smaller. In parallel adding resistor branches decreases the total value of resistance in the circuit, resulting in It being larger.

What happens to current when the length of a wire is doubled?

So, in this equation I equals current, E equals volts, and R equals resistance. Assuming the voltage remains constant, when the length of wire is doubled, the resistance of the wire in the circuit also doubles. This reduces the current by one half.

How does diameter affect the resistance of a wire?

The diameter of a wire affects the resistance of the wire, so that when the diameter is small, the resistance goes up. When the diameter is increased, the resistance is lower. The length of a wire when it is longer, causes the resistance to increase, when the wire is shortened the resistance decreases.

How does conductor size affect current over distance?

The effect of the conductor size on current (over distance) is negligible if the wire is sized to the load being supplied and voltage drop is minimal (i.e. >5\%). If your voltage drop is excessive, size up the conductors and recalculate until it’s less than 5\%. The current will take care of itself (and is a negligible concern).

What happens when potential difference is kept constant in a circuit?

Keeping the potential difference constant the resistance of an electric circuit is doubled. State the change in the reading of an ammeter connected in the circuit. Draw a simple circuit diagram that can be used to verify Ohm’s law. II. Short answer type questions: Calculate the number of electrons constituting one coulomb of charge.

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