A small particle has charge `-5.00muC` and mass `2.00 xx 10-4` kg. It moves from point A where the electric potential is `V_A = +200 V`. to point B, where the electric potential is `V_B=+ 800 V`. The electric force is the only force acting on the particle. The particle has speed `5.00 m/s` at point A. What is its speed at point B? is it moving faster or slower at B than at A. Explain,

A small particle has charge `-5.00muC` and mass `2.00 xx 10-4` kg. It

1.	A small particle has charge `-5.00muC` and mass `2.00 xx 10-4` kg. It moves from point A where the electric potential is `V_A = +200 V`. to point B, where the electric potential is `V_B=+ 800 V`. The electric force is the only force acting on the particle. The particle has speed `5.00 m/s` at point A. What is its speed at point B? is it moving faster or slower at B than at A. Explain,
Answer» Correct Answer - A::B::D `k_A+U_A=k_B+U_B` `:. 1/2mv_A^2+qV_A=1/2mv_B^2+qV_B` `:. v_B=sqrt(v_B^2+2/mq(V_A-V_B)` `=sqrt((5)^2+(2xx(-5xx10^-6))/(2xx10^-4)(200-800)` `=7.42m//s` `v_B-v_A` as the negative charge is moving (freely) from lower potential at `A` to higher potential at `B`. So, its electrostatic `PE` will decrease and kinetic energy will increase.

Discussion

No Comment Found

Related InterviewSolutions

Two spherical , noncoducting and very tin shells of unifromly distributed jpositive charge `Q` and radiuy d are located a distance ` 10d` from each other . A positive point charge q is placed inside one of the shells at a dustabce ` d//2` from the center, on the line connecting the centers of the two shells , as shown in the figure, What is the net force on the charge `q` ? . A. ` (qQ)/(3 61 pi varepsilon_0 d^2) ` to the leftB. `(qQ)/(36 1 pi varepsilon_0 pi d^2) ` to the rightC. ` ( 362qQ)/(36 1 pi varepsilon_0d^2)` to the leftD. `(36 0qQ)/(36 1 pi varepsilon_0d^2)` to the right
A hollow metal sphere of radius ` 5 cm` is charged such that the potential on its surcace is ` 10V`. The potential at the centre of the centre of the sphere is -A. ` 0 V`B. ` 10 V`C. same as at point ` 5 cm` away from the surface out side sphereD. same as a point ` 25` cm away from the surface
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is `10V`. The potential at the distance `3 cm` from the centre of the sphere is:A. zeroB. 10 VC. same as at a point 5 cm away from the surfaceD. same as at a point 25 cm away from the surface
A hollow metal sphere of radius ` 5 cm` is charged such that the potential on its surface is ` 10V`. The potential at the center of the sphere is -
The electric field in the region between two concentric charged spherical shells- (a) is zero (b) increases with distance from centre (c) is constant (d) decreases with distance from centre
A hollow metallic sphere of radius 10 cm is given a charge of `3.2 xx 10^(-9) C.` The electric intensity at a point 4 cm from the center isA. `9xx10^(-9)NC^(-1)`B. `"288 NC"^(-1)`C. `"2.88 NC"^(-1)`D. zero
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 V. The potential at the centre of the sphere is-(a) 800 V (b) zero (c) 8 V(d) 80 V
A hollow metal sphere of radius 10cm is charged such that the potential on its surface is 80 V. The potential at the centre of the sphere isA. zeroB. `80 V`C. `800 V`D. `8V`
The electric field strength in air at NTP is `3 xx 10^(6)V//m`. The maximum charge that can be given to a spherical conductor of radius 3m isA. `3xx 10^(4)C`B. `3 xx 10^(-3)C`C. `3 xx 10^(-2)C`D. `3 xx 10^(-1)C`
Two spherical conductors A and B of radii 1mm and 2mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B isA. `4 :1`B. `1:2`C. `2:1`D. `1:4`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment