thermal

Measurement of Planck’s constant using a light bulb

1. Provided apparatus

1. Provided apparatus

2. This is how you'll measure the room temperature resistance of an incandescent light bulb

2. This is how you’ll measure the room temperature resistance of an incandescent light bulb

3. An assembly of optical components on the optical rail

3. An assembly of optical components on the optical rail

4. Place optical components inside the black box and insert cylindrical tube (having bulb fitted inside) into the black box

4. Place optical components inside the black box and insert cylindrical tube (having bulb fitted inside) into the black box

5. The incandescent light bulb is connected to the variac through an ammeter in series

5. The incandescent light bulb is connected to the variac through an ammeter in series

6. Circuitry of the setup. A voltmeter is connected in parallel configuration while an ammeter in series

6. Circuitry of the setup. A voltmeter is connected in parallel configuration while an ammeter in series

7. Rotate dial of the variac in clockwise direction to get variable voltages

7. Rotate dial of the variac in clockwise direction to get variable voltages

8. Connecting a photodetector to the digital oscilloscope

8. Connecting a photodetector to the digital oscilloscope

9. Adjusting voltage sensitivity range of a digital oscilloscope

9. Adjusting voltage sensitivity range of a digital oscilloscope

DETAIL

Thermal and Electric Properties of a Light Bulb

Bulb2

The aim of the investigation was to probe the electrical and thermal properties of a commercial incandescent light bulb and quantify its temperature using its resistance. The light bulb was also assessed if it behaves like a blackbody and thus follows the Stefan Boltzmann law, for its radiant power and temperature. A thermopile was used to measure the thermal energy emitted by the bulb’s surface, and this in turn was used to compare the transferred thermal power with the temperature of the filament and the bulb’s surface. The results showed that although the filament temperature and surface power do not correlate positively, comparison between surface power and temperature yields a relationship more consistent with Stefan-Boltzmann relationship.

DETAIL

Latent Heat of Vaporization of Liquid Nitrogen and Specific Heats of Metals

1. Provided apparatus

1. Provided apparatus

2. Safety precaution while handling liquid nitrogen

2. Safety precaution while handling liquid nitrogen

3. Circuitry of the setup

3. Circuitry of the setup

4. Configuring the Mass balance

4. Configuring the Mass balance

5. Setup for measuring the background loss

5. Setup for measuring the background loss

6. Pouring the liquid nitrogen into the styrofoam cup

6. Pouring the liquid nitrogen into the styrofoam cup

7. Make sure the resistor is fully immersed

7. Make sure the resistor is fully immersed

8. How to set the output path and and run the Labview file

8. How to set the output path and and run the Labview file

9. Turn ON te variac. Set the voltage at 22V. Don't operate it above 25V

9. Turn ON te variac. Set the voltage at 22V. Don’t operate it above 25V

DETAIL

Heat Transfer and Newton’s Law of Cooling

1. Provided apparatus

1. Provided apparatus

2. Cavity with cooling fan cable

2. Cavity with cooling fan cable

3. Measuring the mass of a cylinder

3. Measuring the mass of a cylinder

4. Measuring the diameter of a cylinder

4. Measuring the diameter of a cylinder

5. Cylinder inside the steel box

5. Cylinder inside the steel box

6. Attaching thermocouple to the cylinder

6. Attaching thermocouple to the cylinder

Heat_7h

8. Always use gloves and tong to remove the heated cylinder from steel box

8. Always use gloves and tong to remove the heated cylinder from steel box

9. Placing a heated cylinder inside the cavity

9. Placing a heated cylinder inside the cavity

10. Attaching E2 thermocouple to the clamp

10. Attaching E2 thermocouple to the clamp

11. Attaching a labeled E1 thermocouple inside the cavity and E2 with the cylinder

11. Attaching a labeled E1 thermocouple inside the cavity and E2 with the cylinder

12. Preparing Labview file for forced convection

12. Preparing Labview file for forced convection

13. Experimenatl setup for demonstarating forced concvection alongwith thermocouple calibration

13. Experimenatl setup for demonstarating forced concvection alongwith thermocouple calibration

14. Closing the base of the cavity

14. Closing the base of the cavity

15. Labview file for radiative and convective losses

15. Labview file for radiative and convective losses

16. Setup for simultaneous radiative and convective losses

16. Setup for simultaneous radiative and convective losses

DETAIL

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