Popular Questions
- A long solenoid of length L has a mean diameter D. It has n layers of winding of N turns each. If it carries a current I, the magn..
- A length of wire carries a steady current. It is bent first to form a circular coil of one turn. The same length is now bent more ..
- A steady electric current is flowing through a cylindrical conductor
- If two parallel wires carry current in opposite directions
- The magnetic field at the centre of a circular current carrying conductor of radius r is Bc . The magnetic field on its axis at a ..
- A circular conductor of radius 5 cm produces a magnetic field of 7 * 10^-6 T. The current flowing through the conductor is
- A current of 10 A is passing through a long wire which has semicircular loop of the radius 20 cm as shown in the figure. Magnetic ..
- A long straight wire of radius a carries a steady current i. the current is uniformly distributed across its
- A current I flows along the length of an infinitely long, straight, thin walled pipe. Then
- A circular coil carrying a certain current produces a magnetic field B0 at its centre. The coil is now rewound so as to have 3 tur..
- A cyclotron is operated at an oscillator frequency of 24 MHz and has a dee radius of 60 cm. Find the magnitude of the magnetic fie..
- An electrically charged particle enters into a uniform magnetic induction field in a direction perpendicular to the field with a v..
- A beam of protons is moving horizontally towards you. As it approaches you, it passes through a magnetic field which is directed u..
- An a - particle and a proton moving with the same kinetic energy enter a region of uniform magnetic field at right angles to the f..
- An electron and a proton are moving on straight parallel paths with same velocity. They enter a semi-infinite region of uniform ma..
- A particle of charge e and mass m moves with a velocity v in a magnetic field B applied perpendicular to the motion of the particl..
- The susceptibility of a magnetism at 300 K is 1.2 * 10^-5. The temperature at which the susceptibility increases to 1.8 * 106^-5 i..
- A susceptibility of a certain magnetic material is 400 . What is the class of the magnetic material ?
- The magnetic susceptibility is negative for
- The magnetic susceptibility of a paramagnetic substance at -73 degree C is 0.0060, then its value at -173 degree C will be
- The magnetic susceptibility of a paramagnetic substance at -73 degree C is 0.0060, then its value at -173 degree C will be
- On applying an external magnetic field, to a ferromagnetic substance domains
- A superconducting material is
- Which of the following is represented by the area enclosed by a hysteresis loop ( B-H curve ) ?
- Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will sh..
- The magnetic susceptibility of paramagnetic materials is
- If a magnetic substance is kept in a magnetic field then which of the following substances is thrown out?
- The magnetic force required to demagnetise the material is
- Susceptibility of ferromagnetic substance is
- Permanent magnet has properties retentivity and coercivity respectively
- Curie-Weiss law is obeyed by iron
- The angle between the true geographic North and the North shown by a compass needle is called as
- The angle between magnetic meridian and geographical meridian is known as
- Tangent galvanometer measures
- The time period of a freely suspended bar magnet in a field is 2s. It is cut into two equal parts along its axis, then the time pe..
- A straight strip has magnetic moment M. If bent as a semicircle, the magnetic moment of the strip will be
- Rate of change of torque r with deflection is maximum for a magnet suspended freely in a uniform magnetic field of induction B, w..
- Electromagnets are made of soft iron because soft iron has
- Which one of the following characteristics is not associated with a ferromagnetic material?
- A paramagnetic substance of susceptibility 3 * 10^-4 is placed in a magnetic field of 4 * 10-^4 Am^-1 . Then, the intensity of mag..
