Related InterviewSolutions

• The electric potential at a point in free space due to a charge `Q` coulomb is `Q xx 10^(11)` volts. The electric field at that point isA. `4 pi epsilon_(0)Q xx 10^(20) "Vm"^(-1)`B. `12 pi epsilon_(0)Q xx 10^(22) "Vm"^(-1)`C. `4 pi epsilon_(0)Q xx 10^(22) "Vm"^(-1)`D. `12 pi epsilon_(0)Q xx 10^(20) "Vm"^(-1)`
• The work done in placing a charge of `8xx10^-18` coulomb on a condenser of capacity 100 micro-farad isA. `16 xx 10^(-32) J`B. `31 xx 10^(-26) J`C. `4 xx 10^(-10) J`D. `32 xx 10^(-32)J`
• If `4 xx 10^(20)eV` energy is required to move a charge of `0.25` coulomb between two points. Then what will be the potential difference between them ?A. 178 VB. 256 VC. 356 VD. None of these
• The work done to move a charge along an equipotential from `A` to `B`A. cannot be defined as `-int_(A)^(B)E.dl`B. must be defined as `-int_(A)^(B)E.dl`C. is zeroD. can have a non-zero value
• The electric potential `V` at any point `(x,y,z)`, all in meters in space is given by `V= 4x^(2)` volt. The electric field at the point `(1,0,2)` in volt//meter isA. 8 along negative X-axisB. 8 along positive X-axisC. 16 along negative X-axisD. 16 along positive Z-axis
• The electric potential `V` is givne as a function of distance `x` (metre) by `V = (5 x^(2) + 10x - 9)` volt. Value of electric field at `x = 1 `isA. `-20 V//m`B. `6 V//m`C. `11 V//m`D. `-23 V//m`
• The work done in bringing a `20` coulomb charge from point `A` to point `B` for disatnce `0.2 m` is `2 J`. The potential difference between the two points will be (in volt)A. 0.2B. 8C. 0.1D. 0.4
• As shown in the figure, charges `+q and -q` are placed at the vertices `B` and `C` of an isoscles triangle. The potential at the vertex `A` is A. `(1)/(4pi epsilon_(0)).(2q)/(sqrt(a^(2)+b^(2)))`B. zeroC. `(1)/(4pi epsilon_(0)).(q)/(sqrt(a^(2)+b^(2)))`D. `(1)/(4pi epsilon_(0)).(-q)/(sqrt(a^(2)+b^(2)))`
• A ball of mass `1g` and charge `10^(-8) C` moves from a point `A`. Where potential is `600` volt to the point `B` where potential is zero. Velocity of the ball at the point `B` is `20 cm//s`. The velocity of the ball at the point `A` will beA. `22.8 " cms"^(-1)`B. `228 " cms"^(-1)`C. `16.8 " ms"^(-1)`D. `168 " ms"^(-1)`
• If an electron moves from rest from a point at which potential is `50` volt to another point at which potential is `70` volt, then its kinetic energy in the final state will beA. `3.2 xx 10^(-10)J`B. `3.2 xx 10^(-18)J`C. 1 ND. 1 dyne