| 1 |
Electric intensity due to an infinite sheet of charge is: |
- A. ∂/2ε<sub>∘</sub>
- B. ∂/rε<sub>∘</sub>
- C. ∂/r2ε<sub>∘</sub>
- D. none of these
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| 2 |
Presence of dielectric always. |
- A. Increase the electrostatic force
- B. Reduces the electrostatic force
- C. Do not effect electrostatic force
- D. Doubles the electrostatic force
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| 3 |
If the potential difference across two plates of capacitor is doubled, then energy stored in it will be. |
- A. Two times
- B. Eight times
- C. Four times
- D. Remain same
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| 4 |
<div>Drum of photocopier is made of.</div> |
- A. Copper
- B. Aluminum
- C. Nickel
- D. Cobalt
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| 5 |
If the separation between the plates of a capacitor is doubled then its capacitance become. |
- A. Double
- B. Half
- C. One fourth
- D. Three times
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| 6 |
The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ</span>) , in this region of space? |
- A. <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ = 0</span>
- B. <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ decreases linearly in the direction of the electric field</span>
- C. <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ increases linearly in the direction of the electric field</span>
- D. <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">ρ has a uniform value throughout the region</span>
- E. <br>
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| 7 |
A force of 0.01 N is exerted on a charge 1.2 x 10<sup>-5</sup> C at a certain point. The electric field at that point is |
- A. 1.2 x 10<sup>4</sup> N/C
- B. 1.2 x 10<sup>4</sup> C/N
- C. 8.3 x 10<sup>2</sup> N/C
- D. 8.3 x 10<sup>-2</sup> N/C
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| 8 |
The process of copying is: |
- A. Axillugraphy
- B. Chromatography
- C. Xerography
- D. Spectrography
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| 9 |
A capacitor is perfect in insulator for. |
- A. Alternating current
- B. Sparking current
- C. Eddy current
- D. Direct current
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| 10 |
Due to polarization, electric field E. |
- A. Increase
- B. Decrease
- C. First increases then decreases
- D. Remain same
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