Physics Lab_21

How to measure Latent Heat? | Measurement of specific latent heat

The two possible methods for measuring latent heats shown below are very similar in principle to the methods for measuring specific heat capacities. [Read about FAQs of Latent Heat] A method for measuring the specific latent heat of vaporisation of water The setup required for a method for measuring the latent heat of vaporization is […]

Measuring the resistance of a component – different ways

In this post, we are going to discuss different ways of measuring the resistance of a component. Resistance is defined as R = V/I. This obviously gives ways of measuring resistance, as in the circuits shown below. Each of the first 2 methods listed below uses both an ammeter and a voltmeter. And, the third […]

How to find resistance using Resistor Colour Codes

Small resistors use coloured or painted bands which represent their resistive value and tolerance. These coloured painted bands produce a system of identification generally known as a Resistors Colour Code. The physical size of the resistor indicates its wattage rating. Resistor Colour Code Table There are two types of resistor colour coding systems, the four-band […]

Measuring frequency & voltage of an Alternating Current (AC) with CRO

An oscilloscope can be used to measure the frequency and voltage of an alternating current. There are two types of oscilloscopes. The traditional cathode-ray oscilloscope (CRO) uses an electron beam. The alternative is a digital oscilloscope, which is likely to be much more compact and which can store data and display the traces later. Practical […]

The Millikan Oil-Drop Experiment

Robert Millikan measured e, the magnitude of the elementary charge on an electron, and demonstrated the quantized nature of this charge with the help of a brilliant set of experiments from 1909 to 1913. The experiment is known as The Millikan Oil-Drop Experiment. His apparatus, diagrammed in Figure 1, contains two parallel metallic plates. Oil […]

How to measure universal gravitational constant | Measurement of G

Henry Cavendish first measured the universal gravitational constant G in 1798. The apparatus used is shown in Figure 1. Other experimenters repeated Cavendish’s measurement of G with various improvements and refinements. All measurements of G are found to be difficult because of the extreme weakness of the gravitational attraction. Setup of Henry Cavendish to measure […]

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