| 1 |
Magnetic effect of electric current was first discovered by: |
Faraday
Ampere
Volta
Lenz
|
| 2 |
Which one is a safety device? |
Switch
Fuse
Circuit breaker
Both B and C
|
| 3 |
Mathematical form of Ohm's law is: |
V = IR
V = I2R
V = Qt
V = IR2
|
| 4 |
What is the voltage across a 6Ω resister when 3A current passes through it? |
2V
9V
18V
36V
|
| 5 |
The S.I unit of electric power is: |
Volt
Watt
Ampere
Joule
|
| 6 |
A conductor of electric current is: |
Wood
Rubber
Plastic
Copper
|
| 7 |
Which wire has lowest resistance? |
Thick wire
Thin wire
Very thin wire
All
|
| 8 |
In mathematical form of Ohm's law, "R" is: |
Resistance
Specific resistance
Resistor
Resistivity
|
| 9 |
Electric current in conductors is due to the flow of: |
Positive ions
Negative ions
Positive charge
Free electrons
|
| 10 |
Which instrument measures the potential difference: |
Voltmeter
Barometer
Galvanometer
Ammeter
|
| 11 |
Mathematical formula of electromotive force (e.m.f) is: |
E = W/Q
E = Q/W
E = WQ
E = W2Q
|
| 12 |
The S.I unit of potential difference is: |
Ampere
Coulomb
Volt
Watt
|
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