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Current Electricity | Free Demo Test
Current Electricity
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Current Electricity
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Question 1 of 6
1. Question
If potential difference across the conductor is one volt and one ampere current is flowing, then resistance of the conductor is
Correct
a. The SI unit of electrical capacitance, equal to the capacitance of a capacitor
in which one coulomb of charge causes a potential difference of one volt is called one farad.
b. The SI unit of electrical resistance, transmitting a current of one ampere when subjected to a potential difference of one volt called one ohm.
c, The SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere is called one coulomb.
d. A unit of electric current equal to a flow of one coulomb per second is called one ampere.
Incorrect
a. The SI unit of electrical capacitance, equal to the capacitance of a capacitor
in which one coulomb of charge causes a potential difference of one volt is called one farad.
b. The SI unit of electrical resistance, transmitting a current of one ampere when subjected to a potential difference of one volt called one ohm.
c, The SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere is called one coulomb.
d. A unit of electric current equal to a flow of one coulomb per second is called one ampere.
Question 2 of 6
2. Question
The reciprocal of the resistance of a conductor is called:
Correct
The opposite of resistance is conductance and its unit is mho.
Incorrect
The opposite of resistance is conductance and its unit is mho.
Question 3 of 6
3. Question
The drift velocity of free electrons in a a metallic conductor is
Correct
The drift velocity is the average velocity that a particle, such as an electron, attains due to an electric field. It can also be referred to as axial drift velocity it is 10-3 msl in metal.
Incorrect
The drift velocity is the average velocity that a particle, such as an electron, attains due to an electric field. It can also be referred to as axial drift velocity it is 10-3 msl in metal.
Question 4 of 6
4. Question
When the temperature of a metallic conductor is increased its resistance
Correct
The resistance increases as the temperature of a metallic conductor increase, so the
resistance is directly proportional to the temperature. When we increases the temperature the
increases the temperature the amplitude of vibration of atoms increases as result of which the number of collision among the electrons and atom increases, and hence resistances increases.
Incorrect
The resistance increases as the temperature of a metallic conductor increase, so the
resistance is directly proportional to the temperature. When we increases the temperature the
increases the temperature the amplitude of vibration of atoms increases as result of which the number of collision among the electrons and atom increases, and hence resistances increases.
Question 5 of 6
5. Question
Conventional current (1) is due to the
Correct
Conventional current is defined to be in the same direction as positive charges. So in metals where the charge carriers (electrons) are negative, conventional current is in the opposite direction as the electrons or the rate of flow of electric current is taken to be opposite to the direction of flow of electrons is called as conventional current
Incorrect
Conventional current is defined to be in the same direction as positive charges. So in metals where the charge carriers (electrons) are negative, conventional current is in the opposite direction as the electrons or the rate of flow of electric current is taken to be opposite to the direction of flow of electrons is called as conventional current
Question 6 of 6
6. Question
The resistance of a conductor increases with the increase in its
Correct
Length is directly proportion to resistance, so resistance increases with increase in length.
Incorrect
Length is directly proportion to resistance, so resistance increases with increase in length.
