The angular deflection of a beam of electrons in a cathode-ray tube due to a magnetic

The angular deflection θ of a beam of electrons in a cathode-ray tube due to a magnetic field is given by

where H is the intensity of the magnetic field, L is the length of the electron path, V is the accelerating voltage and K is a constant. If errors of up to ±0.2% are present in each of the measured H, L and V, what is the greatest possible percentage error in the calculated value of θ (assume that K is known accurately)?

Transcribed Image Text:

HL 0= K- V1/2