Higher Physics Lab Atomic & Nuclear Physics



Exp-1 Investigate the deflection of an electron beam by a magnetic field.
Exp-2 Estimate the specific charge of an electron.
Exp-3 Investigate the deflection of an electron beam by an electric field.
Exp-4 Construct a velocity filter using orthogonal electric and magnetic fields.

  • Four experiment in one setup.
  • Thompson Tube with built-in capacitor and fluorescent screen.
  • Helmholtz Coil for production of magnetic field.
  • Thompson Tube
  • Electric Field
  • Magnetic Field
  • Helmholtz coil
  • Effect of the electric and magnetic field on electron.
  • e/m ratio.

Thompson Tube is used to study the effect of electric and magnetic field on electron. A high voltage is applied between anode and cathode. Electrons are therefore emitted from cathode and accelerated towards anode. Cathode is maintained at ground potential. So electrons are emitted from cathode with a kinetic energy proportional to the anode voltage. These emitted electrons from cathode are then accelerated towards anode and pass horizontally through a slit behind the anode. These energetic electrons then impinge upon fluorescent where they are observed. A plate capacitor is used to displace the electrons vertically upward or downward in fluorescent screen. Helmholtz's coils are used to produce a horizontal magnetic field which moves the electrons in the vertical directions.


Cat. No. Item Name Qty.
U18555 Thompson Tube S 1
U185001 Tube Holder S 1
U185051 Helmholtz Pair of Coils S 1
U33010-230 Power Supply 5 kV (230 V, 50/60 Hz) 1
U33000-230 Power Supply 0 - 500 V (230 V, 50/60 Hz) 1
U138021 Set of 15 Safety Experiment Leads, 75 cm 1

Atomic & Nuclear Physics Experiments