5. Complete Activity 3.5 (Page 38).
- Take an aluminium or copper wire. Clamp this wire on a stand, as shown in Fig. 3.1.
- Fix a pin to the free end of the wire using wax.
- Heat the wire with a spirit lamp, candle or a burner near the place where it is clamped.
- What do you observe after some time?
- Note your observations. Does the metal wire melt?
Answer:
Aim: To fix the pinat the free end of the wire, heat the wire at the other end and make conclusions based on the observations.
Materials Required: Aluminium or copper wire, pin, wax, Bunsen burner, laboratory stand.
Procedure:
(i) Clamp one end of the wire to the laboratory stand.
(ii) Using wax attach a pin to the free end of the wire.
(iii) Heat the clamped end of the wire with a Bunsen burner. Note the observations.
Observations:
- The wax melts and the pin falls to the ground.
- The wire itself does not melt.
Conclusions: We conclude that metals have high melting point and are good conductors of heat.
“5. Complete Activity 3.5 (Page 38).
- Take an aluminium or copper wire. Clamp this wire on a stand, as shown in Fig. 3.1.
- Fix a pin to the free end of the wire using wax.
- Heat the wire with a spirit lamp, candle or a burner near the place where it is clamped.
- What do you observe after some time?
- Note your observations. Does the metal wire melt?” – Solved.
Related Links:
Solution to Activity 3.1
Solution to Activity 3.2
Solution to Activity 3.3
Solution to Activity 3.4
Solution to Activity 3.5
Solution to Activity 3.6
Solution to Activity 3.7
Solution to Activity 3.8
Solution to Activity 3.9
Solution to Activity 3.10
Solution to Activity 3.11
Solution to Activity 3.12
Solution to Activity 3.13
Solution to Activity 3.14
