Audio tape relies on magnetic recording, using a coating of ferromagnetic particles to store information as patterns of magnetization.
The tape of a tape recorder is coated with:
Asked in APPSC Draughtman 2008 · Topic: Physical Properties of Materials (Diamagnetism, Paramagnetism, and Ferromagnetism)
More Physics questions
- The material successfully used as induction core is
- Which of the following is the most suitable material for making permanent magnet?
- Which of the following materials is ferromagnetic ?
- The magnetic field required to reduce the residual magnetization to zero is called
- A parallel-plate capacitor, with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become
- In a bipolar junction transistor
- Two dielectric media D1 and D2 have dielectric constants 3 and 2, respectively. They are separated by x - z plane. A uniform electric field $\vec{E} = 3\hat{i} + 2\hat{j}$ exists in D1. Which one among the following is the correct electric field in D2 at the xz plane ?
- Light Emitting Diode (LED) work on principle of