Magnetic Effects & EMI Mock Tests

A circular loop of radius R carrying current I is placed in a uniform magnetic field B perpendicular to its plane. The tension in the loop is:

A straight conductor of length 0.5 m carrying a current of 3 A is placed perpendicular to a magnetic field of 0.2 T. The force on the conductor is:

A circular coil of N turns and radius R carries a current I. The magnetic field at the center is B. If the same wire is rewound into a coil of n turns and the same current flows, the new magnetic field at the center becomes:

A particle of mass m and charge q enters a uniform magnetic field B with velocity v perpendicular to the field. The radius of the circular path is:

A transformer has 100 turns in the primary coil and 500 turns in the secondary coil. If the primary voltage is 220 V, what is the secondary voltage?

A long solenoid of n turns per unit length and cross-sectional area A carries a current I(t) = I₀ sin(omega t). A circular loop of radius r < A and resistance R is placed coaxially inside the solenoid. The average power dissipated in the loop over one cycle is:

A particle of mass m and charge q moves in a uniform magnetic field B perpendicular to its velocity v. The radius of the circular path is R. If the charge is doubled and the mass is halved, keeping v and B the same, the new radius is:

A proton and a deuteron (mass 2m, charge +e) are accelerated through the same potential difference V and then enter a uniform magnetic field perpendicular to their velocities. The ratio of the radius of the circular path of the proton to that of the deuteron is: