In an experiment to study the potential difference across a resistor and the current through it student recorded the following observations:

Potential difference V

1.0

2.2

3.0

4.0

6.4

Current I

0.1

0.2

0.6

0.4

0.6

On examine of the above observations the teacher asked the student to reject one set of the reading as the values were out of agreement with the rest. Which of the above reading can be readings can be rejected? Calculate the mean value of the resistance of resistor based on the remaining four sets of reading.

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Solution

First of all, if a reading differs from the rest of the readings, then that reading is not discarded but taken in so that the error in measurement can be calculated accurately.
V 1.0 2.2 3.0 4.0 6.4
I 0.1 0.2 0.6 0.4 0.6
R 10 11 5 10 10.66
Mean resistance = 9.33 Î©

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Similar questions

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 as given.

V(volts)	$0.5$	$1.0$	$1.5$	$2.0$	$2.5$	$3.0$	$4.0$	$5.0$
I(amperes)	$0.1$	$0.2$	$0.3$	$0.4$	$0.5$	$0.6$	$0.8$	$1.0$

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

Q. In an experiment to study the dependence of current on potential difference across a resistor, a student obtained the graph as shown in the diagram
find the value of resistance of the resistor

Q. To study the dependence of current (I) on the potential difference (V) across a resistor, the following observations were made by four students A, B, C and D.

Student	Reading No. 1	Reading No. 2	Reading No. 3
A	V = 0.5 V I = 0.1 A	V = 1.0 V I = 0.2 A	V = 1.5 V I = 0.3 A
B	V = 0.8 V I = 0.4 A	V = 1.6 V I = 0.8 A	V = 2.4 V I = 1.2 A
C	V = 1.0 V I = 0.5 A	V = 1.2 V I = 1.4 A	V = 1.4 V I = 1.0 A
D	V = 2.4 V I = 0.8 A	V = 2.7 V I = 0.9 A	V = 3.0 V I = 1.0 A

The teacher found that one of the students has made wrong observations. The student who made the mistake is:
(1) A
(2) B
(3) C
(4) D

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. Four students recorded the readings of the potential difference by observing the position of the pointer of an ideal voltmeter as shown below:

(1) 2.5 V
(2) 2.0 V
(3) 2.2 V
(4) 2.4 V

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Potential difference V	1.0	2.2	3.0	4.0	6.4
Current I	0.1	0.2	0.6	0.4	0.6

First of all, if a reading differs from the rest of the readings, then that reading is not discarded but taken in so that the error in measurement can be calculated accurately.V 1.0 2.2 3.0 4.0 6.4I 0.1 0.2 0.6 0.4 0.6R 10 11 5 10 10.66Mean resistance = 9.33 Î©

First of all, if a reading differs from the rest of the readings, then that reading is not discarded but taken in so that the error in measurement can be calculated accurately.
V 1.0 2.2 3.0 4.0 6.4
I 0.1 0.2 0.6 0.4 0.6
R 10 11 5 10 10.66
Mean resistance = 9.33 Î©