Solenoid and Bar Magnet
Trending Questions
Q. A current loop placed in a magnetic field behaves like a
- Magnetic substance
- Magnetic pole
- All are true
- Magnetic dipole
Q. The magnetic field lines due to a bar magnet are correctly shown in
Q. The magnetic lines of force inside a bar magnet
- Are from north-pole to south-pole of the magnet
- Do not exist
- Are from south-pole to north-pole of the magnet
- Depend upon the area of cross-section of the bar magnet
Q. Two identical short bar magnets, each having magnetic moment of 10 Am2, are arranged such that their axial lines are perpendicular to each other and their centres be along the same straight line in a horizontal plane. If the distance between their centres is 0.2 m, the resultant magnetic induction at a point midway between them is (μ0=4π×10−7 Hm−1)
- √2×10−7 Tesla
- √5×10−7 Tesla
- √2×10−3 Tesla
- √5×10−3 Tesla
Q. The ultimate individual unit of magnetism in any magnet is called
- South pole
- Dipole
- Quadrupole
- North pole
Q. Two similar bar magnets P and Q, each of magnetic moment M, are taken, If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have
- Magnetic moment M4
- Magnetic moment M2
- Equal pole strength
- Magnetic moment M
Q. A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 cm on the opposite sides. Ratio of magnetic fields at these points will be


- 4
- 12√2
- 8
- 3
Q. A small bar magnet has a magnetic moment 1.2 A−m2. The magnetic field at a distance 0.1 m on its axis will be: (μ0=4π×10−7 T−m/A)
- 1.2×10−4 T
- 2.4×10−4 T
- 2.4×104 T
- 1.2×104 T
Q. Points A and B are situated along the extended axis of 2 cm long bar magnet at a distance x and 2x cm respectively. From the pole nearer to the points, the ratio of the magnetic field at A and B will be
- 4 : 1 exactly
- 4 : 1 approx
- 8 : 1 exactly
- 8 : 1 approx
Q. The magnetism of magnet is due to
- Earth
- The spin motion of electron
- Pressure of big magnet inside the earth
- Cosmic rays