Scribd
Upload
197 views2 pages

Act 3

The document provides instructions for an activity to draw and correct circuit diagrams. Students are given diagrams of open circuits and asked to identify incorrectly connected components. They then draw the corrected circuit, connect real components according to the new diagram, and verify if the circuit is functional. Precautions like cleaning wire ends and ensuring proper polarity are also outlined.

Uploaded by

diya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
197 views2 pages

Act 3

The document provides instructions for an activity to draw and correct circuit diagrams. Students are given diagrams of open circuits and asked to identify incorrectly connected components. They then draw the corrected circuit, connect real components according to the new diagram, and verify if the circuit is functional. Precautions like cleaning wire ends and ensuring proper polarity are also outlined.

Uploaded by

diya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

Amity International School, Noida

Physics, Class – XII


Activity -3

Objective:
To draw the diagram of given open circuit comprising at least a battery, resistor/rheostat, key, ammeter and
voltmeter. Mark the components that are not connected in proper order and correct the circuit and
also the circuit diagram.

Apparatus:
A given open circuit comprising at least a cell or a battery, plug key, resistor, rheostat, ammeter, voltmeter,
connecting wires and sandpaper.

Diagram & Theory:

An electrical circuit is functional only if all the components of the circuit are connected in proper order,
assuming that all circuit components/devices are in working condition and key is closed. An open circuit
means a break in some part of a circuit which could be deliberate such as a key in open position or a fault such
as broken wire or burnt-out component(s) or loose connection. Some of such circuits are given below.

Procedure:

1. Draw the circuit diagrams in your notebook. [Fig. (a), (b), (c) and (d)].
2. Consider one circuit and mark in the table the various components which have not been connected in
proper order.
3. Draw the correct circuit diagram.
4. Connect the electrical components according to corrected circuit diagram.
5. Close the key in the circuit to verify if the corrected circuit is functional.
Note: Rheostat can be used both as a variable resistance and potential divider.

Rheostat as a Variable Resistance & Potential Divider


Discussion:
a) Rheostat can be used in series as a variable resistance by using one end terminal and the other
variable terminal. Refer to fig (a)
b) Rheostat can be used as a potential divider across the cell by using (i) the end terminals (1) and (2)
connected to input potential (battery) and (ii) one end terminal and the other variable terminal for
variable voltage. Refer to fig (b)
.
Observation:
Refer to the circuit and put a tick against the component if connected correctly.

S.No. Circuit Component Fig-1 Fig-2


1 Battery/Cell
2 Resistor
3 Rheostat
4 Ammeter
5 Voltmeter
6 Key

Correct Circuit Diagram:

Result: The electrical circuit assembled as per the corrected circuit diagram is functional.

Precautions:

1. Ends of the connecting wires should be cleaned with sandpaper before making connections.
2. The positive terminal of the battery should be connected to the positive terminal of the voltmeter and
positive terminal of the ammeter.
3. The ammeter should be connected in series with the resistor and the voltmeter should be connected in
parallel with it.

You might also like