| 1 |
Which of the following is used for correcting myopic eyes?
|
Convex Lens <br>
Concave Lens <br>
Cylindrical Lens<br>
None of these<br>
|
| 2 |
The focal length of a convex lens is
|
Shorter for blue light than for red <br>
The same for all colours <br>
Shorter of red light than for blue <br>
Maximum for yellow light <br>
|
| 3 |
When you pull out the plug connected to an electrical appliance, you often a observe a spark. To which property of the appliance, is this related?
|
Capacitance <br>
Resistance <br>
Inductance <br>
Wattage <br>
|
| 4 |
The velocity of sound is maximum in -
|
Vacuum <br>
Metal<br>
Liquid <br>
Air<br>
|
| 5 |
Which type of reaction produces the most harmful radiation
|
Fusion reaction<br>
Chemical reaction<br>
Fission reaction<br>
Photo-chemical reaction<br>
|
| 6 |
For lubricating roller bearing.Lubricant generally required is
|
Semi-solid <br>
Solid <br>
Liquid <br>
None of these<br>
|
| 7 |
The forward resistance of a diode is
|
Zero <br>
Infinity <br>
Very small <br>
Very large<br>
|
| 8 |
Megger is an instrument to measure
|
Very low resistance <br>
Insulation resistance <br>
Q of a coil<br>
Inductance of coil <br>
|
| 9 |
If the current and the voltage are out of phase by 90 degree, then the power is
|
Minimum <br>
Maximum <br>
1.1 VI<br>
Zero <br>
|
| 10 |
Critical resistance of a DC generator RC is
|
Inversely proportional to speed <br>
Proportional to speed <br>
Inversely proportional to the square of speed <br>
proportional to the square of speed <br>
|
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