An electron moves in a circular arc of radius 10 m at a constant speed of 2 × 107 ms -1 with its plane of motion normal to a magnetic flux density of 10-5 T. What will be the value of specific charge of the electron?

Question

An electron moves in a circular arc of radius 10 m at a constant speed of 2 × 107 ms -1 with its plane of motion normal to a magnetic flux density of 10-5 T. What will be the value of specific charge of the electron? (A) 2 × 104 Ckg -1 (B) 2 × 105 Ckg -1 (C) 5 × 106 Ckg -1 (D) 2 × 1011 Ckg -1

Tardigrade Admin · Accepted Answer

B q v=(m v2/r) or (q/m)=(v/r B)

Q. An electron moves in a circular arc of radius $10 m$ at a constant speed of $2 \times 1 0^{7} m s^{- 1}$ with its plane of motion normal to a magnetic flux density of $1 0^{- 5} T$ . What will be the value of specific charge of the electron?

$2 \times 1 0^{4} C k g^{- 1}$

$2 \times 1 0^{5} C k g^{- 1}$

$5 \times 1 0^{6} C k g^{- 1}$

$2 \times 1 0^{11} C k g^{- 1}$

$Bq v = \frac{m v ^{2}}{r}$ or $\frac{q}{m} = \frac{v}{r B}$

Q. An electron moves in a circular arc of radius 10m at a constant speed of 2×107ms−1 with its plane of motion normal to a magnetic flux density of 10−5T. What will be the value of specific charge of the electron?

2×104Ckg−1

2×105Ckg−1

5×106Ckg−1

2×1011Ckg−1