Why is there a difference between measured and calculated resistance?

There could be several reasons. Measurement was faulty due to errors in measurement or inaccuracy of the setup or instruments. Calculations are in correct as you might not have factored in all parameters such as internal resistance. Impedance of the instruments used, connections are not perfect.

What is the difference between the actual and measured value?

Hint: Measured value is the value of the quantity we measure in any way, may be with an instrument or bare hands. True value is the value of the same quantity or the variable which is its actual value. True value can’t be obtained in an easy way as it is nearly an ideal condition.

Is true resistance greater or smaller than measured resistance?

(1) The value of the measured resistance is always smaller than the value of the true resistance, it can be understood by the following example.

Why are voltage measurements more preferred to current measurements in the vast majority of fault finding and location situations?

One reason is that voltages can propagate over relatively long distances compared to current because of lower resistive losses. For example, early telegraph systems in the US worked on relatively low voltages and the current carried the telegraph pulses.

What’s the difference between theoretical and practical?

As adjectives the difference between theoretical and practical. is that theoretical is of or relating to theory; abstract; not empirical while practical is based on practice or action rather than theory or hypothesis.

Why is a resistor needed in a circuit?

In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

What is the difference between a measurement and a calculation?

is that calculate is (mathematics) to determine the value of something or the solution to something by a mathematical process while measure is to ascertain the quantity of a unit of material via calculated comparison with respect to a standard.

Which error can be defined as the variation between the value of actual and measured?

absolute error
The absolute error can be defined as the variation between the values of actual and measured.

How do you find the equivalent resistance of a circuit?

Find the Equivalent Resistance of the given circuit. To get the Equivalent Resistance we combine resistors in series and in parallel. Here, and are in parallel. So, the equivalent resistance is given as Also, the and resistors are in series.

Why are the theoretical and experimental values for the resistance different?

The theoretical and experimental values for the resistance are different since the electricity has to travel through extra wire in case 1 and this wire causes resistance which adds to the value of the final resistance measured.

What is equivalent resistance (EQ)?

What is Equivalent Resistance? The equivalent resistance is defined as a point where the total resistance is measured in a parallel or series circuit (in either the whole circuit or in a part of the circuit). The equivalent resistance is defined between two terminals or nodes of the network.

How does the wire’s resistance affect the resistance of a circuit?

The wire’s resistance adds on to the calculated resistors value. Series: The theoretical and experimental values for the resistance are different since the electricity has to travel through extra wire in case 1 and this wire causes resistance which adds to the value of the final resistance measured.