1 |
Coulomb's law is mathematically stated as: |
- A. F = k q1 q2/r3
- B. F = k q2 q2 / r2
- C. F = k q1 q2 / r
- D. F = k q1 q2 / r2
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2 |
The 1st practical electric battery is known as: |
- A. Voltaic
- B. Pile
- C. Voltaic pile
- D. Voltaic cell
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3 |
The speed of sound in air at 100°C is: |
- A. 380ms-1
- B. 382ms-1
- C. 386ms-1
- D. 300ms-1
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4 |
A positive electric charge: |
- A. Attracts other positive charge
- B. Repels other positive charge
- C. Attracts a neutral charge
- D. Repels a neutral chage
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5 |
1 volt is equal to: |
- A. JC
- B. JC<sup>-1</sup>
- C. JC<sup>-2</sup>
- D. JC<sup>-3</sup>
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6 |
Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is: |
- A. 0.5 V
- B. 2 V
- C. 5 V
- D. 10 V
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7 |
1 nano farad is equal to: |
- A. 1 x 10<sup>-12</sup> F
- B. 1 x 10<sup>9</sup>F
- C. 1 x 10<sup>-9</sup>F
- D. 1 x 10<sup>-6</sup>F
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8 |
<p class="MsoNormal">Which is used to investigate the properties of electron
beam:<o:p></o:p></p> |
- A. <p class="MsoNormal">LDR<o:p></o:p></p>
- B. <p class="MsoNormal">Electroscope<o:p></o:p></p>
- C. <p class="MsoNormal">Proton gun<o:p></o:p></p>
- D. <p class="MsoNormal">Electron gun<o:p></o:p></p>
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9 |
A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is: |
- A. 4 times smaller than before
- B. 4 times larger than before
- C. 8 times larger than before
- D. 16 times larger than before.
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10 |
<p class="MsoNormal">At room temperature, electrons cannot escape the metal
surface due to ………….. of atomic nucleus:<o:p></o:p></p> |
- A. <p class="MsoNormal">Repulsive forces<o:p></o:p></p>
- B. <p class="MsoNormal">Attractive forces<o:p></o:p></p>
- C. <p class="MsoNormal">Gravitational forces<o:p></o:p></p>
- D. <p class="MsoNormal">Electromagnetic forces<o:p></o:p></p>
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