To determine the equivalent resistance of a series combination of two resistors $R_{1}$ and $R_{2}$ , a student arranges the following set up.
Which of the following statements will be true for this circuit ?

Incorrect reading for current I as well as potential difference V

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Incorrect reading for current I but correct reading for potential difference V

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Correct reading for current I but incorrect reading for potential difference V

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Correct reading for both current I and potential difference V

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Solution

The correct option is C Correct reading for current I but incorrect reading for potential difference V
(C) Ammeter is in series so correct for current

But voltmeter is not in parallel with $R_{1}$ and $R_{2}$

So in correct reading for potential difference V.

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Similar questions

In order to determine the equivalent resistance of two resistors R₁ and R₂ connected in series, a student made this circuit for his experiment.

The only statement which is true for this circuit is that it gives:
(1) incorrect readings for current I as well as for potential difference V
(2) correct reading for current I but incorrect reading for potential difference V
(3) incorrect reading for current I but correct reading for potential difference V
(4) correct readings for both current I and potential difference V

Q. In an experiment to find the equivalent resistance of two resistors connected is series, a student used the circuit shown:
This circuit will give :

(1) correct reading for voltage V but incorrect reading for current I
(2) correct reading for current I but incorrect reading for voltage V
(3) correct reading for both voltage V and current I
(4) Incorrect readings for both current I and voltage V

Q. The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are given below :

\begin{matrix} V (volts) & 0.5 & 1.0 & 1.5 & 2.0 & 2.5 & 3.0 & 4.0 & 5.0 I (amperes) & 0.1 & 0.2 & 0.3 & 0.4 & 0.5 & 0.6 & 0.8 & 1.0 \end{matrix}

Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.

Q. A voltmeter and an ameter are connected in series to an ideal cell of e.m.f. E. the voltmeter reading is V and the ammeter reading is I . then
i. V < E
ii. The Voltmeter resistance is V/I
iii.the potential difference across the ammeter is E -V
iv. voltmeter resistance plus ammeter resistance =E/I
correct statements are

The graph of potential difference (V) versus current (I) for an ohmic resistor is a straight line as shown below:

The resistance of the resistor can be determined from this graph as:

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To determine the equivalent resistance of a series combination of two resistors R1 and R2, a student arranges the following set up.Which of the following statements will be true for this circuit ?

The correct option is C Correct reading for current I but incorrect reading for potential difference V(C) Ammeter is in series so correct for current But voltmeter is not in parallel with R1 and R2So in correct reading for potential difference V.

To determine the equivalent resistance of a series combination of two resistors $R_{1}$ and $R_{2}$ , a student arranges the following set up.
Which of the following statements will be true for this circuit ?

The correct option is C Correct reading for current I but incorrect reading for potential difference V
(C) Ammeter is in series so correct for current

But voltmeter is not in parallel with $R_{1}$ and $R_{2}$

So in correct reading for potential difference V.