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प्रश्न
Write the underlying principle of a moving coil galvanometer.
State the principle of working of a galvanometer
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उत्तर
Principle:
- When a current-carrying coil is placed in a magnetic field, it experiences torque. This is the underlying principle of a moving coil galvanometer.
- This torque tends to twist the coil about the suspension axis, increasing the magnetic flux going through the coil.
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संबंधित प्रश्न
Obtain the expression for current sensitivity of moving coil galvanometer.
Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity. Explain, giving reason.
Can a galvanometer as such be used for measuring the current? Explain.
How will you convert a moving coil galvanometer into a voltmeter?
State the principle of the working of a moving coil galvanometer, giving its labeled diagram ?
What are the advantages of using soft iron as a core, instead of steel, in the coils of galvanometers?
The deflection in a moving coil galvanometer is ______.
A moving coil galvanometer can be converted into an ammeter by ______.
Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns may not necessarily increase its voltage sensitivity.
Reason (R): The resistance of the coil of the galvanometer increases on increasing the number of turns.
Select the most appropriate answer from the options given below:
A voltmeter of variable ranges 3 V, 15 V, 150 V is to be designed by connecting resistances R1, R2, R3 in series with a galvanometer of resistance G = 20 Ω, as shown in Fig. The galvanometer gives full pass through its coil for 1 mA current i.e. "gives full pass through it's coil for 1 mA current". Then, the resistances R1, R2 and R3 (in kilo ohms) should be, respectively:
