1 |
The property of substance, which opposes the flow of current through it is called. |
- A. Resistance
- B. Reactance
- C. Resistivity
- D. None of these
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2 |
<p class="MsoNormal">Which type of image is produced by the converging lens of
human eye if it views a distant object:<o:p></o:p></p> |
- A. <p class="MsoNormal">Real, erect, same size<o:p></o:p></p>
- B. <p class="MsoNormal">Real, inverted, diminished<o:p></o:p></p>
- C. <p class="MsoNormal">Virtual, erect, diminished<o:p></o:p></p>
- D. <p class="MsoNormal">Virtual, inverted, magnified<o:p></o:p></p>
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3 |
In mathematical form of Ohm's law, "R" is: |
- A. Resistance
- B. Specific resistance
- C. Resistor
- D. Resistivity
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4 |
According to Ohm's law V =________ |
- A. I<sup>2</sup>R
- B. IR<sup>2</sup>
- C. IR
- D. I/R
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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 |
What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A? |
- A. 4.8 W
- B. 14.5 W
- C. 30 W
- D. 60 W
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7 |
<p class="MsoNormal">The mirror whose outer 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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8 |
The unit of power is _________ |
- A. Volt
- B. Watt
- C. Joule
- D. Coulomb
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9 |
The A.C. used in our houses has frequency _____ cycle/sec |
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10 |
<p class="MsoNormal">The sensation of sound persists in our brain for:<o:p></o:p></p> |
- A. <p class="MsoNormal">0.1 sec<o:p></o:p></p>
- B. <p class="MsoNormal">0.01 sec<o:p></o:p></p>
- C. <p class="MsoNormal">1 sec<o:p></o:p></p>
- D. <p class="MsoNormal">10 sec<o:p></o:p></p>
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