What is current sensitivity?

Current sensitivity : It is defined as the deflection of coil per unit current flowing in it. Current Sensitivity Voltage sensitivity : It is defined on the deflection of coil per unit potential difference across its ends.

What is current sensitivity and how will you increase the current sensitivity?

Current sensitivity can be increased by increasing the number of turns of the coil. Since voltage sensitivity decreases with increase in resistance of the coil, the effect of increase in number of turns is nullified in the case of voltage sensitivity.

Does increase in current sensitivity necessarily increases voltage sensitivity?

Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity. But increase of n increases the resistance R of galvanometer. Due to it, Vs will decrease. A can not be increased beyond a limit because in that case the entire coil will not be in a uniform magnetic field.

How can the current sensitivity increased class 12?

By increasing the magnetic field within the circuit, the sensitivity of the moving coil galvanometer can be increased. By increasing the area of the coil used in the moving coil galvanometer the sensitivity can be increased.

How can we increase voltage sensitivity?

Current sensitivity or voltage sensitivity of a moving coil galvanometer can be increased by : (i) Increasing the number of turns in the galvanometer coil. (ii) Decreasing the torsion constant of the suspension fibre.

What is the relation between current sensitivity and voltage sensitivity?

i.e. Voltage sensitivity is calculated by dividing current sensitivity to resistance. The above relation means that the voltage sensitivity will remain unchanged if the current sensitivity increases as well as the resistance increases in the same order.

How can you increase the current sensitivity of a moving coil galvanometer?

The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.

How can you increase current sensitivity of a galvanometer without changing its voltage sensitivity?

Current sensitivity does not depend upon resistance(R), whereas voltage sensitivity does, as evident from their expressions. Current sensitivity can be increased by increasing the number of turns of the coil. However, this increases the resistance of the coil also(R is proportional to length of conductor).

How does current sensitivity increase?

So, sensitivity of the galvanometer can be increased either by increasing the number of turns (N), using strong magnets or increasing the area of the coil (A). So, the correct answer is that the sensitivity of a moving coil galvanometer can be increased by increasing the number of turns of the coil.

Why does increasing the current sensitivity may not necessarily increase in voltage sensitivity?

Increasing the current sensitivity may not necessarily increase the voltage sensitivity of galvanometer. There is a factor of resistance R in voltage sensitivity. Hence, increasing the current sensitivity may not necessarily increase the voltage sensitivity of a galvanometer.

How can you increase the current sensitivity of moving coil galvanometer?

So, the correct answer is that the sensitivity of a moving coil galvanometer can be increased by increasing the number of turns of the coil.

What is the relation between voltage sensitivity and current sensitivity of moving coil galvanometer of resistance G?

σi​G​=σv​

What is the difference between current sensitivity and voltage sensitivity?

Current sensitivity does not depend upon resistance (R), whereas voltage sensitivity does, as evident from their expressions. Current sensitivity can be increased by increasing the number of turns of the coil.

How do you increase the current sensitivity of a coil?

Current sensitivity can be increased by increasing the number of turns of the coil. However, this increases the resistance of the coil also(R is proportional to length of conductor). Since voltage sensitivity decreases with increase in resistance of the coil, the effect of increase in number of turns is nullified in the case of voltage sensitivity.

How can the current sensitivity of a galvanometer be increased?

The correct answer is Increasing the magnetic induction. The current sensitivity of a Galvanometer can be increased by increasing the magnetic induction. The current sensitivity of a galvanometer is defined as the deflection produced in the galvanometer when a unit current passes through it. Equation for Current sensitivity:

What happens to voltage sensitivity when the number of turns is doubled?

Justification: When number of turns N is doubled, then the current sensitivity (∝ N) is doubled; but at the same time, the resistance of galvanometer coil (G) will also be doubled, so voltage sensitivity (Sv ∝​ N/G) will remain unchanged; hence inreasing current sensitivity does not necessarily increase the voltage sensitivity. +1 vote

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