| 1 |
<p class="MsoNormal">An object is placed at the Centre of curvature of a concave
mirror. The image produced by the mirror is located:<o:p></o:p></p> |
- A. <p class="MsoNormal">Out beyond the centre of curvature<o:p></o:p></p>
- B. <p class="MsoNormal">At the centre of curvature<o:p></o:p></p>
- C. <p class="MsoNormal">Between the centre of curvature and the focal point<o:p></o:p></p>
- D. <p class="MsoNormal">At the focal point<o:p></o:p></p>
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| 2 |
<p class="MsoNormal">Electron gun has an electrode called for controlling the
flow of electrons in the beam:<o:p></o:p></p> |
- A. <p class="MsoNormal">Plate<o:p></o:p></p>
- B. <p class="MsoNormal">Grid<o:p></o:p></p>
- C. <p class="MsoNormal">Screen<o:p></o:p></p>
- D. <p class="MsoNormal">Filament<o:p></o:p></p>
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| 3 |
<p class="MsoNormal">The mirror whose inner surface is reflecting is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Concave mirror<o:p></o:p></p>
- B. <p class="MsoNormal">Convex mirror<o:p></o:p></p>
- C. <p class="MsoNormal">Mirror<o:p></o:p></p>
- D. <p class="MsoNormal">Lens<o:p></o:p></p>
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| 4 |
Current is equal to: |
- A. IR<sup>2</sup>
- B. CV
- C. Q/t
- D. IR
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| 5 |
Electric current in conductors is due to the flow of: |
- A. Positive ions
- B. Negative ions
- C. Positive charge
- D. Free electrons
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| 6 |
<p class="MsoNormal">The critical angle for a beam of light passing from water
into air is 48.8 degrees. This mean that all light rays with an angle of
incidence greater than this angle will be:<o:p></o:p></p> |
- A. <p class="MsoNormal">Absorbed<o:p></o:p></p>
- B. <p class="MsoNormal">Totally reflected<o:p></o:p></p>
- C. <p class="MsoNormal">Partially reflected and partially transmitted<o:p></o:p></p>
- D. <p class="MsoNormal">Totally transmitted<o:p></o:p></p>
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| 7 |
The S.I unit of electric current is: |
- A. Volt
- B. Ampere
- C. Coulomb
- D. Watt
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| 8 |
<p class="MsoNormal">Which type of image is formed by a convex lens on a screen:<o:p></o:p></p> |
- A. <p class="MsoNormal">Inverted and real<o:p></o:p></p>
- B. <p class="MsoNormal">Inverted and virtual<o:p></o:p></p>
- C. <p class="MsoNormal">Upright and real<o:p></o:p></p>
- D. <p class="MsoNormal">Upright and virtual<o:p></o:p></p>
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| 9 |
A conductor of electric current is: |
- A. Wood
- B. Rubber
- C. Plastic
- D. Copper
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| 10 |
The ampere is a unit of: |
- A. Energy
- B. Potential differrence
- C. Electric potential
- D. Electric current
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