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प्रश्न
The figure below shows a circuit containing an ammeter A, a galvanometer G and a plug key K. When the key is closed:
विकल्प
both G and A show deflections.
neither G nor A shows deflection.
G shows deflection but A does not.
A shows deflection but G does not.
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उत्तर
A shows deflection but G does not.
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संबंधित प्रश्न
Why is it necessary to introduce a cylindrical soft iron core inside the coil of a galvanometer?
Two moving coil meters, M1 and M2 have the following particulars:
R1 = 10 Ω, N1 = 30,
A1 = 3.6 × 10–3 m2, B1 = 0.25 T
R2 = 14 Ω, N2 = 42,
A2 = 1.8 × 10–3 m2, B2 = 0.50 T
(The spring constants are identical for the two meters.)
Determine the ratio of
- current sensitivity and
- voltage sensitivity of M2 and M1.
Why is it necessary to introduce a radial magnetic field inside the coil of a galvanometer?
Why does a galvanometer when connected in series with a capacitor show a momentary deflection, when it is being charged or discharged?
How does this observation lead to modifying the Ampere's circuital law?
Hence write the generalised expression of Ampere's law.
Outline the necessary steps to convert a galvanometer of resistance RG into an ammeter of a given range ?
In an ammeter 0.5% of main current passes through galvanometer; If resistance of galvanometer is G, the resistance of ammeter will be.
When a galvanometer is shunted with a 4 Ω resistance, the deflection is reduced to one-fifth. If the galvanometer is further shunted with a 2 Ω wire. The further reduction (find the ratio of decrease in current to the previous current) in the deflection will be (the main current remains the same)
How is current sensitivity increased?
A resistance of 3Ω is connected in parallel to a galvanometer of resistance 297Ω. Find the fraction of current passing through the galvanometer.
To convert a moving coil galvanometer into an ammeter we need to connect a ______.
