Question:
Tangent galvanometer is used to measure
Tangent galvanometer is used to measure
Updated On: Jul 26, 2024
- potential difference
- current
- resistance
- charge
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The Correct Option is B
Solution and Explanation
When a current is passed through the galvanomejer coil, then a magnetic fieid B is produced at right angles to the plane of the coil, ie, at right angles to the horizontal component of earth's magnetic field H. Under the influence of two crossed magnetic fields B and H, the magnetic needle of galvanometer undergoes a deflection $ \theta $ which is given by the tangent Iaw. Using tangent law, we can find a relation
$ \, \, \, \, \, \, I \propto \tan \theta $
Which clearly indicates that tangent. galvanometer is an instrument used for detection of electric current in a circuit.
$ \, \, \, \, \, \, I \propto \tan \theta $
Which clearly indicates that tangent. galvanometer is an instrument used for detection of electric current in a circuit.
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Concepts Used:
Electrical Instruments
There are various electrical instruments used to measure current, power, voltage, etc. Some of them are briefly explained below:
Moving Coil Galvanometer
- It is an electromagnetic device which measures small values of current.
- Its working principle is that whenever a current loop is placed in a magnetic field, it experiences a certain torque. The value of that torque can be modified by modifying the current in the loop.
- For a current carrying loop having N turns, and cross sectional area A, carrying current i, whenever it is placed in and along the direction of an external magnetic field B, it experiences a torque given by:
ԏ = NiAB
