# Period of oscillation of dip needle

• Amith2006
In summary, the time period of a dip needle vibrating in the magnetic meridian is 3 seconds and 3(2)^(1/2) when vibrating in the horizontal plane. The angle of dip of the place can be determined by the horizontal component of Earth's magnetic field exerting a restoring couple on the dip needle. However, further steps are needed to solve this problem.
Amith2006
1)The time period of a dip needle vibrating in the vertical plane in the magnetic meridian is 3 seconds. When the same magnetic needle is made to vibrate in the horizontal plane, the time period of vibration is 3(2)^(1/2). What is the angle of dip of the place?
I think in both the cases, it is the horizontal component of earth’s magnetic field that exerts a restoring couple on the dip needle and causes it to oscillate. But how to go further?Please give an idea on how to solve this problem.

Amith2006 said:
1)The time period of a dip needle vibrating in the vertical plane in the magnetic meridian is 3 seconds. When the same magnetic needle is made to vibrate in the horizontal plane, the time period of vibration is 3(2)^(1/2). What is the angle of dip of the place?
I think in both the cases, it is the horizontal component of earth’s magnetic field that exerts a restoring couple on the dip needle and causes it to oscillate. But how to go further?Please give an idea on how to solve this problem.
My interpretation: When the needle is in the vertical plane in the magnetic meridian it should be free to align with the full magnetic field. When it is horizontal, it can only align with the horizontal component.

Last edited:
That's great!Thanks.

## 1. What is the period of oscillation of a dip needle?

The period of oscillation of a dip needle refers to the time it takes for the needle to complete one full swing or cycle from one side to the other.

## 2. How is the period of oscillation of a dip needle measured?

The period of oscillation can be measured by using a stopwatch or timer to record the time it takes for the needle to complete one full swing. This can be repeated multiple times to get an average value.

## 3. What factors affect the period of oscillation of a dip needle?

The period of oscillation can be affected by the length of the needle, the strength of the Earth's magnetic field, and any external forces such as wind or vibrations.

## 4. Why is the period of oscillation of a dip needle important?

The period of oscillation of a dip needle is important because it can help determine the strength and direction of the Earth's magnetic field. It is also used in navigation and surveying to determine the latitude and longitude of a location.

## 5. How does the period of oscillation of a dip needle change at different locations on Earth?

The period of oscillation of a dip needle can vary depending on the location on Earth due to differences in the Earth's magnetic field. At the equator, the period of oscillation is shorter compared to the poles where it is longer.

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