Moving Charges and Magnetism questions
775 published questions with worked solutions.
- The magnetic moments associated with two closely wound circular coils a and b of radius r and 2r respectively are equal if (where...
- A rod with a circular cross-section area 2 cm ^2 and length 40 cm is wound uniformly with 400 turns of an insulated wire. If a...
- Two long straight wires are arranged parallel to each other and are kept 20 cm apart in vacuum. They carry currents of 2A and 4A...
- If the number of turns in the coil of a moving coil galvanometer decreases, the resistance of the galvanometer
- Only 4 % of the total current in the circuit passes through a galvanometer. If the resistance of the galvanometer is G, then the...
- The ratio of magnetic field at the center of the current carrying circular loop and magnetic moment is 'x'. When both the current...
- A circular coil of radius 'r' and number of turns 'n' carries a current 'I'. The magnetic fields at a small distance 'h' along...
- When moving coil galvanometer (MCG) is converted into a voltmeter, the series resistance is 'n' times the resistance of...
- A solenoid of length 0.4 m and having 500 turns of wire carries a current 3A. A thin coil having 10 turns of wire and radius 0.1...
- Magnetic field at the center of the hydrogen atom due to motion of electrons in n^ th orbit is proportional to
- A thin ring of radius 'R' metre has charge 'q' coulomb uniformly spread on it. The ring rotates about its axis with a constant...
- A charge moves in a circular path perpendicular to a magnetic field. The time period of revolution is independent of
- Lorentz magnetic force is acting on a particle of charge q moving with velocity V in magnetic field B .The work done by this...
- If a galvanometer is shunted by ( 1 n-1 )^ th of the value of its resistance, then the fraction of the total current passing...
- When a resistance of 200 is connected in series with a galvanometer of resistance G, its range is V. To triple its range, a...
- A galvanometer has resistance 80 and it is shunted with resistance 20 . If 20% of the main current flows through galvanometer,...
- Two parallel wires separated by distance 'b' are carrying equal current 'I' in the same direction. The force per unit length of...
- A circular loop of radius R is carrying current I. The ratio of magnetic field at the center of circular loop and at a distance R...
- Torque acting on a coil carrying current 'I' situated parallel to magnetic field of induction 'B' having 'n' turns and area 'A' is
- A charged particle is moving in a uniform magnetic field in a circular path of radius 'R'. When the energy' of the particle...
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