The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?

Question

The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio? (A) -1.76 × 108 coulombs/g (B) 1.76 × 10-8 coulombs/g (C) -1.76 × 1010 coulombs/g (D) -1.76 × 10-10 coulombs/g

Tardigrade Admin · Accepted Answer

Charge of an electron is =-1.6 × 10-19 C Mass of electron is 9.1 × 10-31 kg =9.1 × 10-28 g Thus, Charge/mass ratio is (-1.6 × 10-19/9.1 × 10-28) =-1.76 × 108 coulombs / g

Q. The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?

$- 1.76 \times 1 0^{8}$ coulombs/g

$1.76 \times 1 0^{- 8}$ coulombs/g

$- 1.76 \times 1 0^{10}$ coulombs/g

$- 1.76 \times 1 0^{- 10}$ coulombs/g

Charge of an electron is
$= - 1.6 \times 1 0^{- 19} C$
Mass of electron is
$9.1 \times 1 0^{- 31} k g = 9.1 \times 1 0^{- 28} g$
Thus, Charge/mass ratio is
$\frac{- 1.6 \times 1 0 ^{- 19}}{9.1 \times 1 0 ^{- 28}}$
$= - 1.76 \times 1 0^{8}$ coulombs $/ g$

Q. The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?

−1.76×108 coulombs/g

1.76×10−8 coulombs/g

−1.76×1010 coulombs/g

−1.76×10−10 coulombs/g

Charge of an electron is =−1.6×10−19C Mass of electron is 9.1×10−31kg=9.1×10−28g Thus, Charge/mass ratio is 9.1×10−28−1.6×10−19​ =−1.76×108 coulombs /g

$- 1.76 \times 1 0^{8}$ coulombs/g

$1.76 \times 1 0^{- 8}$ coulombs/g

$- 1.76 \times 1 0^{10}$ coulombs/g

$- 1.76 \times 1 0^{- 10}$ coulombs/g

Charge of an electron is
$= - 1.6 \times 1 0^{- 19} C$
Mass of electron is
$9.1 \times 1 0^{- 31} k g = 9.1 \times 1 0^{- 28} g$
Thus, Charge/mass ratio is
$\frac{- 1.6 \times 1 0 ^{- 19}}{9.1 \times 1 0 ^{- 28}}$
$= - 1.76 \times 1 0^{8}$ coulombs $/ g$