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Magnetic Declination Video Lecture | Physics Class 12 - NEET

157 videos|453 docs|185 tests

FAQs on Magnetic Declination Video Lecture - Physics Class 12 - NEET

1. What is magnetic declination?
Ans. Magnetic declination is the angle between magnetic north (the direction a compass needle points) and true north (the direction towards the North Pole) at a particular location on the Earth's surface. It is caused by the movement of the Earth's magnetic field and varies depending on the geographical location.
2. Why is magnetic declination important?
Ans. Magnetic declination is important for navigation purposes, especially when using a compass. By knowing the magnetic declination, one can accurately convert between magnetic bearings and true bearings, ensuring accurate navigation and orientation.
3. How does magnetic declination affect compass readings?
Ans. Magnetic declination affects compass readings by causing a deviation between magnetic north and true north. If the magnetic declination is not taken into account, compass readings can be inaccurate and lead to navigational errors. To obtain true bearings, the magnetic declination must be added or subtracted from the compass reading, depending on the direction.
4. How can I determine the magnetic declination at my location?
Ans. There are several ways to determine the magnetic declination at a specific location. One way is to consult magnetic declination charts provided by reputable sources, such as national geological survey organizations. Another option is to use online tools or smartphone apps that provide real-time magnetic declination based on your GPS coordinates.
5. Does magnetic declination change over time?
Ans. Yes, magnetic declination changes over time due to the movement of the Earth's magnetic field. The rate of change varies depending on the location. It is advisable to regularly update magnetic declination values to ensure accurate navigation.
157 videos|453 docs|185 tests
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