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Q: Where is the zero located on the scaleof galvanometer?
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Why do you need to set a galvanometer to 0?

Zero is the normal position of the galvanometer when there is no detection in process.

What is the ideal internal resistance of galvanometer?


Does interchanging the galvanometer ad battery in a wheatstone bridge affect the balance?

No.AnswerWork it out, yourself, from first principles. Start with the assumption that, for the bridge to be 'balanced' (i.e. with no current flowing through the galvanometer), the potential-difference across the galvanometer is zero. It is quite simple.

Why doesn't any current flow through the galvanometer in a balanced Wheatstone bridge?

There is no current flow through the galvanometer in a balanced Wheatstone bridge because, in the balanced state, the voltage on both terminals of the galvanometer is the same. Since the voltage differential in zero, there can be no current.

How galvanometer measure the exact voltage with series high resistor?

Assuming galvanometer has zero or negligible internal resistance. If u connect resistor R>>RL(Load resistance) and connect it parallel to RL, it will hardly cause any change in voltage across load resistance. Suppose small current Ig goes through galvanometer. Since galvanometer have zero internal resistance, Voltage across RL = Voltage across R = IgR

What is the difference between the construction of a moving coil galvanometer and a ballistic galvanometer?

What is the difference between the construction of a moving coil galvanometer and a ballistic galvanometer?

What is a NULL Point of a galvanometer?

Its a point on the galvanometer where the galvanometer shows no deflection as no current passes through it.

Does a galvanometer have a reversed current or not?

The current is reversed in a galvanometer

How do you convert galvanometer to an ohmmeter?

"An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current."The unit of measurement for resistance is ohms (Ω).It is useful device for rapid measurement of resistance. It is consist of galvanometer and adjustable resistance Rs of known value and a cell connected in series. The resistance R to be measured is connected between the terminals.The series resistance Rs is so adjusted that when the terminals are short circuited i.e., when R = 0, the galvanometer gives full scale deflection. So the extreme graduation of the usual scale the galvanometer is marked 0 for resistance measurement. When terminals are not joined no current passes through the galvanometer and its deflection will be zero . Thus zero of the scale marked as infinity. . When R is not infinite , the galvanometer deflects to some intermediate point depending on the value of R scale can be calibrated to read the resistance directly.

What is galvanometer constant and how to find it?

The galvanometer constant is the factor that relates the deflection of a galvanometer to the current passing through it. It is usually given as the current required to produce a unit deflection (such as one full-scale deflection) on the galvanometer. To find the galvanometer constant, you can pass a known current through the galvanometer and measure the corresponding deflection, then calculate the constant as the current divided by the deflection.

Why A sensitive galvanometer cannot be stable?

A sensitive galvanometer is highly responsive to small changes in current, making it prone to disturbances from external factors like temperature fluctuations or electromagnetic interference. These disturbances can cause fluctuations in the readings of the galvanometer, leading to instability in its output. Additionally, the delicate construction of a sensitive galvanometer can make it more susceptible to mechanical vibrations or shocks, further affecting its stability.

What are applications of ballistic galvanometer?

Ballistic galvanometers are used in applications where a very short-duration current measurement is required, such as measuring the charge of particles in particle physics experiments or determining the output of pulsed power supplies. They are also used in high-speed photography to capture events that occur in a very short period of time.