Question

Specific charge of electrons is

• A. $1.76 \times 10^{11}\, C \,kg ^{-1}$
• B. $1.6 \times 10^{-19}\, C\, kg ^{-1}$
• C. $9.11 \times 10^{-31}\, C\,kg ^{-1}$
• D. $1.67 \times 10^{-27} \,C\, kg ^{-1}$

Answer 1

Answer: (A)

Specific charge is $1.76 \times 10^{11} \,C \,kg ^{-1}$.
By applying mutually perpendicular electric and magnetic fields across the discharge tube, $JJ$ Thomson was the first to determine the speed and the specific charge [Charge to mass ratio $(e / m)$ of the cathode ray particles.