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Physics activities
Contents
Activity 1:-To assemble the household circuit comprising three on/off
switches ,a fuse ,a power source ,three holders and three bulbs
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Also draw the correct circuit diagram
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Activity 4:-Assemble and arrangement for observing deflection of
magnetic needle placed near a conductor carrying current
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Activity 6:-To identify a diode, a LED, a transistor, an IC, a resistor and a
capacitor from mix collection of such items
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Activity 8:-To study the nature of image form by concave and convex
mirror
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)
Activity 9:-Explain the formation of various images formed by a concave
mirror for various position of object
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ACTIVITY 1
Aim:- To assemble the household circuit comprising three on/off switches
,a fuse ,a power source ,three holders and three bulbs
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Arrangement:-

Procedure:1
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The other end of the holder is connected to
the black flexible wire
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Three bulb – switch combination are connected in parallel, red wire
ends of one point and black wire ends of other point
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Fuse F is connected at the end of the red wire
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A 2 pin plug is connected at the ends of the two wires
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The plug is inserted in the 2 pin socket provide at the main electric
board with a main switch
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Observation:The bulb glows when the switch is made ON and it stops glowing when
the switch is put OFF
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To make
the components are not connected in proper and correct the circuit
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Ammeter should always be connected in series
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Voltmeter should always be connected in parallel
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Rheostat should always be connected in series
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Key should always be connected in series
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Precautions:1
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2
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ACTIVITY 3
Aim:- To assemble the components of a given circuit
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Ohm’s law circuit:-

Procedure-:
1
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The Voltmeter is connected parallel to the resistance
2
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Precautions:1
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2
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ACTIVITY 4
Aim:- Assemble and arrangement for observing deflection of magnetic
needle placed near a conductor carrying current
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Theory:- When electric current passes through a conductor magnetic
field is produced around it
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Procedure:1
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The cell/ battery, Rheostat, Ammeter, and the key are
connected in series as shown in figure
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2
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The magnetic and direction of the
deflection of the needle are observed
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Rheostat is adjusted for two more reading ‘k’ is closed, the current
flows through the circuit
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4
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Conclusion:A magnetic field is produced near a current carrying Conductor, the
direction and initiation of the field depend on the direction and
magnitude of current flowing through the conductor
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Apparatus:- Carbon resistance ,a battery eliminator (2v,4v & 6v), a step
down transformer,a plug key & multimeter
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The S
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unit
of resistance is Ohm (Ω)
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The power rating
may be as low as 0
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Generally the
resistors are made from mixtures of carbon and graphite with a power
insulating material which acts as a binder
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Resistors are colour coded
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The digits are associated with the various colour as
follows
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For the measurement of DC, Galvanometer is used
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For the measurement of AC, the AC ammeter is used
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e
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Carrying wire is proportional to the square of
current
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Procedure: - (For measurement of resistance)
1
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2
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3
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4
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5
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6
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7
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8
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For the measurement of DC voltage-:
1
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2
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3
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4
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e
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For measurement of AC voltage-:
1
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Now, touch the
metallic ends of the probes to the two terminal of AC source
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Note the reading
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Record the experiment for different values of AC voltage
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Turn the selector towards the given mgadim
2
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3
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ACTIVITY 6
Aim:- To identify a Diode, a LED, a Transistor ,an IC, a Resistor and a
Capacitor from mix collection of such items
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Theory:-Diode, LED, Resistor and a Capacitor have two legs each, the
Transistor has 3 legs and an IC has minimum 8 legs
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For the
identification of Diode, LED, Resistor and Capacitor help of current can
be taken
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When DC is supplied to the Capacitor, the Multimeter set at R, shows ‘0’
(Zero) deflection after the sudden full scale deflection
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When a diode emits light then it is a LED
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First we pick up the components with minimum number of legs
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The components with 3 legs is a Transistor
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The components with 8 or more legs is an IC
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Take the Multimeter with selector switch turn the positive R for
checking the conductivity of current
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Apparatus:- White paper, Glass slab, Drawing pins, Meter scale, Pencil
etc
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It
emerges from the other parallel surface in the same direction
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Here, < i = < e
Procedure:1
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2
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Now
remove the glass slab
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Draw a line N1N2 on the point B perpendicular to side PS
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Now draw a angle making an angle ‘i’ with the normal
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Now fix points L and M at 5-10 cm distance from each other
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6
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7
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8
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9
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10
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ACTIVITY 8
Aim:- To study the nature of image by a spherical mirror
(Convex/Concave) or (Identification of Concave and Convex mirror)
Concave mirror:- In case of a Concave mirror reflecting surface is
towards the centre of the sphere of which the mirror is a part
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Nature of image of a Concave mirror:1
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The image is real & inverted
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Virtual Image- When the object is hold in front of a concave mirror
between the pole (P) & principal focus (F), the image is virtual, erect &
magnified
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ACTIVITY 9
Aim- To explain the formation of various images formed by a concave
mirror for various position of object
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If the object is placed at infinity ,the image is form at focus F
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2
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The
image is real, inverted & diminished
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If the object is placed at C, the image is form at C
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4
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The
image is real, inverted & highly magnified
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If the object is placed at F, the image is form at infinity
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6
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The image is virtual, erect & magnified
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1
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The
image is real, inverted and point size
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If the object is placed beyond center of curvature C1, the image is
formed between F2 and C2
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3
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The image is real, inverted and same size that of the object
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If the object is placed between centre of curvature C1 and focus F1
image is formed beyond centre of curvature C2
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6
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The image is virtual
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