| 1 |
<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>
|
| 2 |
<p class="MsoNormal">LDR can act as:<o:p></o:p></p> |
- A. <p class="MsoNormal">Diode<o:p></o:p></p>
- B. <p class="MsoNormal">Switch<o:p></o:p></p>
- C. <p class="MsoNormal">Transistor<o:p></o:p></p>
- D. <p class="MsoNormal">Rectifier<o:p></o:p></p>
|
| 3 |
What is the voltage across a 6Ω resistor when 3 A of current passes through it? |
- A. 2 V
- B. 9 V
- C. 18 V
- D. 36 V
|
| 4 |
Electric current in conductors is due to the flow of: |
- A. Positive ions
- B. Negative ions
- C. Positive charge
- D. Free electrons
|
| 5 |
Mathematical form of Ohm's law is: |
- A. V = IR
- B. V = I2R
- C. V = Qt
- D. V = IR2
|
| 6 |
Which instrument measures the potential difference: |
- A. Voltmeter
- B. Barometer
- C. Galvanometer
- D. Ammeter
|
| 7 |
<p class="MsoNormal">J.J Thomson observed deflection of cathode rays in:<o:p></o:p></p> |
- A. <p class="MsoNormal">1895<o:p></o:p></p>
- B. <p class="MsoNormal">1896<o:p></o:p></p>
- C. <p class="MsoNormal">1897<o:p></o:p></p>
- D. <p class="MsoNormal">1998<o:p></o:p></p>
|
| 8 |
<p class="MsoNormal">AND operation is represented by:<o:p></o:p></p> |
- A. <p class="MsoNormal">Dot (.)<o:p></o:p></p>
- B. <p class="MsoNormal">Addition (+)<o:p></o:p></p>
- C. <p class="MsoNormal">Division (<span style="font-family: Arial, sans-serif; color: rgb(34, 34, 34); background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">÷</span>)<o:p></o:p></p>
- D. <p class="MsoNormal">Minus (-)<o:p></o:p></p>
|
| 9 |
If we double both the current and the voltage in a circuit while keeping its resistance constant, the power. |
- A. remains unchanged
- B. halves
- C. doubles
- D. four time
|
| 10 |
The current used in houses is: |
- A. A.C.
- B. Conventiona current
- C. Current
- D. D.C
|
