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Laboratory hot plate — reference view
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Heating surface

Transfers heat to a compatible vessel. The surface can remain hot after power is removed.

Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.

Laboratory hot plate — reference view

Image: Jeffrey M. Vinocur · Source / original · CC BY 2.5

Resized and converted to WebP; original colours retained.

Laboratory hot plate

Temperature & incubation

Laboratory hot plate

Heating plate · hotplate stirrer

THE FIRST VIVA QUESTION

What is its use?

Heats compatible vessels; some models also provide magnetic stirring.

Tap a number to locate its part. Zoom, drag or use full screen to inspect the reference. Models and graduations can differ; check the actual apparatus used in your laboratory.

01 / IDENTIFICATION

How to recognise it.

  1. Flat heating surface
  2. Temperature or power controls
  3. Stable electrical housing
Tell the difference.

A hotplate stirrer has a separate mixing function; heating alone does not ensure a uniform sample temperature.

02 / NUMBERED PARTS

Point them out.

Choose a part to bring its numbered marker into view.

03 / WORKING PRINCIPLE

The science behind the reading.

Electrical energy heats a surface that transfers heat to the vessel and sample.

04 / VIVA PRACTICE

Think first. Then reveal.

Explain your answer aloud before opening it.

01Is the dial always the sample temperature?
SUGGESTED ANSWER

No. The control may set power or plate temperature; the sample may differ.

02Why choose compatible vessels?
SUGGESTED ANSWER

Thermal stress, material limits and contact stability affect safe heating.

03Does an unlit plate mean it is cool?
SUGGESTED ANSWER

No. Residual heat can remain after the heater is switched off.

04What does a magnetic stir bar do?
SUGGESTED ANSWER

It couples to the rotating magnetic field in suitable stirrer models and mixes the liquid.

Read the references.

Teaching and clinical references are listed here. Image attribution and licence appear below the viewer.