A charged particle of mass 3 × 10-3 Kg and charge 6 × 10-6 C enters in an electric field of 7 V / m. Then its kinetic energy after 1 m is

Question

A charged particle of mass 3 × 10-3 Kg and charge 6 × 10-6 C enters in an electric field of 7 V / m. Then its kinetic energy after 1 m is (A) 10-4 J (B) 9 × 10-2 J (C) 1.05 × 10-3 J (D) 4.2 × 10-5 J

Tardigrade Admin · Accepted Answer

K . E =Δ U = q Δ V = qEd =4.2 × 10-5 J

Q. A charged particle of mass $3 \times 1 0^{- 3} K g$ and charge $6 \times 1 0^{- 6} C$ enters in an electric field of $7 V / m$ . Then its kinetic energy after $1 m$ is

$1 0^{- 4} J$

$9 \times 1 0^{- 2} J$

$1.05 \times 1 0^{- 3} J$

$4.2 \times 1 0^{- 5} J$

$K . E = Δ U$
$= q Δ V$
$= qE d = 4.2 \times 1 0^{- 5} J$

Q. A charged particle of mass 3×10−3Kg and charge 6×10−6C enters in an electric field of 7V/m. Then its kinetic energy after 1m is

10−4J

9×10−2J

1.05×10−3J

4.2×10−5J