Magnetic lines of Force | Magnetic Field

When current flows in a wire, it creates a magnetic effect around the wire which is called magnetic field. The magnetic field is specified by a direction as well as a magnitude. The following figure shows a magnetic field, of a bar magnet, by field lines that originate from the …

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Voltmeter-Definition and Working Principle

A voltmeter is a basic device used for the measurement of electric potential or voltage, in volts. As discussed in ammeter section, any basic meter mechanism has a voltage Vm across its terminals when a full-scale current Im, flows through the meter. It follows that basic meter mechanism can be calibrated …

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Magnetism

Magnetism is a property associated with materials that attract iron and iron alloys. The science of magnetism probably began with early Greeks. From that time to the present many recognized the physical effects of magnetism, yet until this century, no one understood why certain materials were a magnet. Presently it …

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Ammeter- Definition and Working Principle

An Ammeter is a device used for the measurement of current in amperes. When the current in a circuit is substantially less than an ampere, its value is determined by the use of a milliammeter or micro-ammeter, which measures full-scale currents in milli-amperes or microamperes, respectively. The symbol for the ammeter …

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Superposition Theorem

Superposition theorem is stated as follows: The current is any circuit element or voltage across any element of a linear bilateral network is the algebraic sum of the currents or voltages separately produced by each source of energy. Simultaneous equations may be avoided in the solution of a complex network …

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Metric Units of Measurement SI Units

SI units are most widely used units of measurement belong to an international system of units which is also known as SI or Metric System. SI comprises of three main categories which are prefixes, base units and derived units. SI base units are seven which are defined as; Length (Meter) …

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