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mcq on Electric Current. We covered all the mcq on Electric Current in this post for free so that you can practice well for the exam.
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Mock test on Electric Current for Students
The frequency of direct current is ……..
(a) zero
(b) 50 Hz
(c) 60 Hz
(d) 100 Hz
Option a – zero
Ohm’s law describes the relationship between ……… and ……….
(a) the potential difference, electric charge
(b) electric current, electric charge
(c) electric charge, time
(d) the potential difference, electric current
Option d – the potential difference, electric current
Which among the following is an example of an ohmic conductor?
(a) Germanium
(b) Silicon
(c) Carbon
(d) Silver
Option d – Silver
If 2 coulombs of charge pass through the cross-section of a conductor in one second, what will be the current?
(a) 1/2 ampere
(b) 1/4 ampere
(c) 2 amperes
(d) 1 ampere
Option c – 2 amperes
Which device from the list below is non-ohmic?
(a) Conducting copper coil
(b) Electric heating coil
(c) Semiconductor diode
(d) Rheostat
Option c – Semiconductor diode
Which statement regarding Ohm’s law is incorrect?
(a) Ohm’s law assumes current through a conductor is always directly proportional to the potential difference applied to it.
(b) A device follows Ohm’s law if its resistance does not depend on the size and polarity of the applied potential difference.
(c) A material follows Ohm’s law if its resistance is unaffected by the size and direction of the applied Electric Field.
(d) All homogeneous materials follow Ohm’s law regardless of whether the field is weak or strong.
Option d – All homogeneous materials follow Ohm’s law regardless of whether the field is weak or strong.
The SI unit of electrical resistance is ……..
(a) Volt
(b) Ohm
(c) Mole
(d) Ampere
Option b – Ohm
The resistance of a metallic wire is ……..
(a) directly proportional to its length and inversely proportional to its cross-sectional area
(b) inversely proportional to the product of its cross-sectional area and length
(c) inversely proportional to its length and directly proportional to its cross-sectional area
(d) directly proportional to the product of its cross-sectional area and length
Option a – directly proportional to its length and inversely proportional to its cross-sectional area
Assertion (A): The Coulomb force is the dominant force in the universe. Reason (R): The Coulomb force is stronger than the gravitational force.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Option d – A is false, but R is true
A proton and an electron placed in a uniform Electric Field will experience ……..
(a) equal forces in the same direction
(b) equal forces in opposite directions
(c) equal acceleration in opposite directions
(d) equal magnitude of acceleration
Option b – equal forces in opposite directions
Electric Field lines ……..
(a) can never intersect
(b) do not originate in mid-space
(c) are perpendicular to the surface of a charged conductor
(d) All of the above
Option d – All of the above
The SI unit of electric dipole moment is ……..
(a) Volt
(b) Joule
(c) Coulomb/m
(d) Coulomb-m
Option d – Coulomb-m
…….. is defined as “the work done in moving a unit charge between two points in an electric circuit.”
(a) Current
(b) Potential difference
(c) power
(d) Resistance
Option b – Potential difference
A charge of 2 C moves between two points with a potential difference of 5 V. The work done is ……..
(a) 10 J
(b) 0.4 J
(c) 2.5 J
(d) 5 J
Option a – 10 J
A parallel plate Capacitor with air between its plates has a capacitance C. If the gap is filled with a dielectric of constant 7, the capacitance becomes ……..
(a) C
(b) C/7
(c) 7C
(d) 14C
Option c – 7C
Which phenomenon can cause an insulator to gain charge?
(a) Current Electricity
(b) Static Electricity
(c) Magnetic field
(d) Gravitational field
Option b – Static Electricity
The SI unit of electric charge is ……..
(a) Volt
(b) Ampere
(c) Coulomb
(d) Ohm
Option c – Coulomb
When you walk on a woolen carpet and touch a metal door handle, you receive an electric shock because ……..
(a) charge moves from your body to the handle
(b) a chemical reaction occurs on contact
(c) your body temperature is higher than that of the handle
(d) your body and the handle reach thermal equilibrium
Option a – charge moves from your body to the handle
The process of transferring charge from a charged object to the Earth is called ……..
(a) Discharging
(b) Earthing
(c) Interaction
(d) Lightning
Option b – Earthing
Which law states that doubling the distance between two electric charges reduces the force between them to one-fourth of its original value?
(a) Coulomb’s Law
(b) Pascal’s Law
(c) Stefan’s Law
(d) Hooke’s Law
Option a – Coulomb’s Law
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