Question

In a hydrogen atom, the electron moves in an orbit of radius 2 Å making 8 × 10¹⁴ revolutions per second. Find the magnetic moment associated with the orbital motion of the electron.

What is current sensitivity of a galvanometer ? Show how the current sensitivity of a galvanometer may be increased. "Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity." Explain.

A moving coil galvanometer has a resistance 15 Ω and takes 20 mA to produce full scale deflection. How can this galvanometer be converted into a voltmeter of range 0 to 100 V ?

An electron moving with a velocity v⃗ = (1.0 × 10⁷ m/s)î + (0.5 × 10⁷ m/s)ĵ enters a region of uniform magnetic field B⃗ = (0.5 mT)ĵ. Find the radius of the circular path described by it. While rotating; does the electron trace a linear path too ? If so, calculate the linear distance covered by it during the period of one revolution.

A particle of mass m and charge q moving with a uniform velocity v = v₀ₓ î + v₀ᵧ ĵ enters a region with a magnetic field B = B₀ ĵ. After some time, an electric field E = E₀ ĵ is also switched on in the region. The resulting path described by the particle will be :