An electron (charge =1.6× 10-19C ) is meaning in a circle of radius 5.1× 10-11m at a frequency of 6.8× 1015 revolution/s. The equivalent current is approximately

Question

An electron (charge =1.6× 10-19C ) is meaning in a circle of radius 5.1× 10-11m at a frequency of 6.8× 1015 revolution/s. The equivalent current is approximately (A)  5.1× 10-3A  (B)  6.8× 10-3A  (C)  1.1× 10-3A  (D)  2.2× 10-3A

Tardigrade Admin · Accepted Answer

Charge Q=it ne=it i=(ne/t) =(6.8× 1015× 1.6× 10-19/1) =1.08× 10-3A =1.1× 10-3A

Q. An electron (charge $= 1.6 \times 10^{- 19} C$ ) is meaning in a circle of radius $5.1 \times 10^{- 11} m$ at a frequency of $6.8 \times 10^{15}$ revolution/s. The equivalent current is approximately

$5.1 \times 10^{- 3} A$

$6.8 \times 10^{- 3} A$

$1.1 \times 10^{- 3} A$

$2.2 \times 10^{- 3} A$

Charge $Q = i t$ $n e = i t$ $i = \frac{n e}{t}$ $= \frac{6.8 \times 10 ^{15} \times 1.6 \times 10 ^{- 19}}{1}$ $= 1.08 \times 10^{- 3} A$ $= 1.1 \times 10^{- 3} A$

Q. An electron (charge =1.6×10−19C ) is meaning in a circle of radius 5.1×10−11m at a frequency of 6.8×1015 revolution/s. The equivalent current is approximately

5.1×10−3A

6.8×10−3A

1.1×10−3A

2.2×10−3A