General Science/Basic Science Ohms Law Sample Test,Sample questions

Question:
A current of 2 A is passed through a conductor of resistance 10 ?. The potential between the ends of the conductor is

1.50 V

2.20 V

3.1/5 V

4.2 V


Question:
A resistance wire is made into 5 equal parts and all the five parts are connected in parallel. What is the ratio of the effective resistance to the original resistance

1.5-Jan

2.10-Jan

3.25-Jan

4.10


Question:
A tape recorder is marked as 6 V and 300 mA. If the voltage drops to 5V the decrease in current of the tape recorder is

1.250 mA

2.200 mA

3.50 A

4.50 mA


Question:
A wire has a length of 1 m area of cross section of 0.5 mm2 and specific resistance of 50 ? 10-8 ?m. The resistance of the wire is

1.10 ?

2.5 ?

3.1 ?

4.20 ?


Question:
At constant temperature the current flowing in a conductor is proportional to potential difference between the ends. This is

1.Joule�s law

2.Faraday�s law

3.Lenz�s law

4.Ohm�s law


Question:
The bulb is labeled as 250 V 100 W. What is the resistance of the filament of the bulb in ohm

1.350

2.625

3.150

4.25000


Question:
The current in an electric circuit is

1.proportional to the resistance

2.proportional to the conductance

3.inversely proportional to the potential difference

4.proportional to temperature


Question:
The expression for specific resistance of a wire is

1.L/RA

2.RA/L

3.AL/R

4.R/AL


Question:
The resistance of a conductor is due to

1.the flow of current in the conductor

2.the collision of electrons with atoms

3.The attractive force between electrons and protons

4.the thermal agitation of electrons


Question:
The resistance of a conductor with a diameter of 2 mm is 20 ?. If the diameter is doubled with length remaining the same the resistance becomes

1.5 ?

2.10 ?

3.30 ?

4.40 ?


Question:
The resistance of a medal in terms of its volume v is

1.?Lv/A

2.?L/Av

3.?L2/v

4.?v/ L2


Question:
The specific resistance of a wire depends on

1.its radius

2.Its length

3.the material of the wire

4.its shape


Question:
The unit of conductivity is

1.ohm-metre

2.mho-metre

3.mho-metre-1

4.ohm-metre-1


Question:
The unit of resistivity is

1.ohm-metre

2.mho-metre-1

3.mho-metre

4.ohm-metre-1


Question:
Three resistance are connected to from the side of a triangle ABC. If the resistances AB BC CA respectively are 40 ohm 60 ohm and 100 ohm the effective resistance between the points A and B

1.32 ?

2.50 ?

3.64 ?

4.200 ?


Question:
Two resistors each of resistance 6 ? are connected in parallel and the combination in series with a resistor of resistance 2 ? and an accumulator of emf 2 ?. The current in the circuit is

1.1/7 A

2.2.5 A

3.0.4 A

4.7:00 AM


Question:
Two resistors of 6 ? and 4 ? are connected in parallel and the combination is connected in series with a resistance of 2.6 ? and an accumulator of e.m.f. 2V. The current in the circuit in ampere is

1.2/12.6

2.2/26.6

3.5-Feb

4.2/4.6


Question:
When a potential difference of 12 V cause a current flow of 3 A in a conductor what is the resistance of the conductor

1.0.5 ?

2.2 ?

3.4 ?

4.6 ?


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