| 1. | Sparking occurs when a load is switched off because the circuit has high ? | |
|
resistance
|
||
|
inductance
|
||
|
capacitance
|
||
|
impedance
|
||
View Answer
Discuss in Forum
Report Question| 2. | Electric current passing through the circuit produces ? | |
|
magnetic effect
|
||
|
luminous effect
|
||
|
thermal effect
|
||
|
all above effects
|
||
| 3. | Insulating materials have the function of ? | |
|
preventing a short circuit between conducting wires
|
||
|
preventing an open circuit between the voltage source and the load
|
||
|
conducting very large currents
|
||
|
storing very high currents
|
||
| 4. | Resistance of carbon filament lamp ...... as the applied voltage increases ? | |
|
increases
|
||
|
decreases
|
||
|
remains same
|
||
|
none of the above
|
||
| 5. | The number of electrons in the outermost orbit of carbon atom is ? | |
|
3
|
||
|
4
|
||
|
6
|
||
|
7
|
||
| 6. | A rheostat differs from potentiometer in the respect that it ? | |
|
has lower wattage rating
|
||
|
has higher wattage rating
|
||
|
has large number of turns
|
||
|
offers large number of tappings
|
||
| 7. | For testing appliances, the wattage of test lamp should be ? | |
|
very low
|
||
|
low
|
||
|
high
|
||
|
any value
|
||
| 8. | The rating of a fuse wire is always expressed in ? | |
|
ampere-hours
|
||
|
ampere-volts
|
||
|
kWh
|
||
|
amperes
|
||
| 9. | Which of the following statement is true ? | |
|
A galvanometer with low resistance in parallel is a voltmeter
|
||
|
A galvanometer with high resistance in parallel is a voltmeter
|
||
|
A galvanometer with low resistance in series is an ammeter
|
||
|
A galvanometer with high resistance in series is an ammeter
|
||
| 10. | Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ? | |
|
100 W lamp will glow brighter
|
||
|
40 W lamp will glow brighter
|
||
|
Both lamps will glow equally bright
|
||
|
40 W lamp will fuse
|
||