Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment m. Which configuration has highest net magnetic dipole moment?
Options
(1) a (2) b (3) c […]
A moving coil galvanometer of resistance 100 Ω is converted to ammeter by a resistance of 0.1 Ω in the circuit. Galvanometer gives full scale deflection at 100 μA. The minimum current in the circuit […]
A bar magnet of pole strength 10 A-m is cut into two equal parts breadthwise. The pole strength of each magnet is
Options
(a) 5 A-m (b) 10 A-m (c) 15 A-m (d) […]
Which of the following particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field?
Options
(a) Li⁺ (b) Electron (c) Proton (d) He⁺
Correct Answer: […]
A circular coil of radius 10cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil?
Options
(a) 3.142×10⁴ A-m² (b) 10⁴ A-m² (c) 3.142 A-m² (d) […]
A bar magnet of moment of inertia I is vibrated in a magnetic field of induction 0.4×10⁻⁴ T. The time period of vibration is 12 s. The magnetic moment of the magnet is 120Am². The […]
A super conductor exhibits perfect
Options
(a) Ferrimagnetism (b) Ferromagnetism (c) Paramagentism (d) Diamagnetism
Correct Answer:
Diamagnetism
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
A circuit area 0.01 m² is kept inside a magnetic field which is normal to its plane. The magnetic field changes from 2 tesla to 1 tesla in 1 milli second. If the resistance of […]
A bar magnet of moment M and pole strength m is cut into parts of equal lengths. The magnetic moment and pole strength of either part is
Options
(a) M/2, m/2 (b) M, […]
At which place, Earth’s magnetism becomes horizontal
Options
(a) Magnetic pole (b) Geographical pole (c) Magnetic meridian (d) Magnetic equator
Correct Answer:
Magnetic equator
Explanation:
No explanation available. Be the first to write […]
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