| 1 |
The electrical intensity is equal to: |
- A. -Δr/Δv
- B. Δv/Δr
- C. Δv/Δv
- D. -Δv/Δr
|
| 2 |
The electrons in one coulomb change is equal to. |
- A. 1.6 x 10<sup>-19</sup>
- B. 2.25 x 10<sup>-19</sup>
- C. 6.25 x 10<sup>-18</sup>
- D. 6.25 x 10<sup>-19</sup>
|
| 3 |
the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to. |
- A. 25 N
- B. 20 N
- C. 10 N
- D. 15 N
|
| 4 |
The SI unit of relative permittivity is. |
- A. Fm-1
- B. C2N-1m-2
- C. Nm2C-2
- D. No unit
|
| 5 |
One joule is equal to. |
- A. 1.6 x 10<sup>19</sup> eV
- B. 1.6 x 10<sup>-19</sup> eV
- C. 6.25 x 10<sup>-18</sup> eV
- D. 6.25 x 10 <sup>18</sup> eV
|
| 6 |
If both the magnitude of charges and distance between them is doubled, then coulomb's force will be. |
- A. Doubled
- B. Hlaf
- C. Remain same
- D. One fourth
|
| 7 |
The electric field lines are closer where the field is |
- A. Strong
- B. Weak
- C. Uniform
- D. Variable
|
| 8 |
Flux through any closed surface is: |
- A. 1/ε<sup>2</sup><sub>∘</sub> times the total charge enclosed in it
- B. ε<sup>2</sup><sub>∘</sub> time the total charge enclosed in it
- C. 1/ε<sub>∘</sub> ties the total charge enclosed in ti
- D. ε<sub>∘</sub> time the total charge enclosed in it
|
| 9 |
Electric potential at a distance ''r'' from ''q'' is: |
- A. V<sub>r</sub> = 1/54πε<sub>∘</sub>q/r<sub>2</sub>
- B. Vr=1/4πε<sub>∘</sub><sup>2</sup>q/r
- C. V<sub>r</sub>=1/4πε<sub>∘</sub>2q/r
- D. V<sub>r</sub>=1/4πε<sub>∘</sub>q<sup>2</sup>/r
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| 10 |
A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when: |
- A. q=Q/4
- B. q=Q/2
- C. q=Q
- D. None of these
|