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 ……..
(a) zero
(b) 50 Hz
(c) 60 Hz
(d) 100 Hz
Option a – zero
Ohm’s law states the relation 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 one of the following is an ohmic conductor?
(a) Germanium
(b) Silicon
(c) Carbon
(d) Silver
Option d – Silver
If two Coulomb of charge flows the cross-section of a conductor is one second, what will be the current flowing there?
(a) 1/2 Ampere
(b) 1/4 Ampere
(c) 2 Amperes
(d) 1 Ampere
Option c – 2 Amperes
Which one of the following devices is non-Ohmic?
(a) Conducting copper coil
(b) Electric heating coil
(c) Semi-conductor diode
(d) Rheostat
Option c – Semi-conductor diode
Which one of the following statements regarding Ohm’s law is not correct?
(a) Ohm’s law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.
(b) A conducting device obeys Ohm’s law when the resistance of a device is independent of the magnitude and polarity of applied potential difference.
(c) A conducting material obeys Ohm’s law when the resistance of the material is independent of the magnitude and direction of the applied electric field.
(d) All homogeneous materials obey Ohm’s law irrespective of whether the field is within range or strong.
Option d – All homogeneous materials obey Ohm’s law irrespective of whether the field is within range or strong
What is the SI unit of electrical resistance?
(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 area of cross-section.
(b) inversely proportional to the product of its area of cross-section and length.
(c) inversely proportional to its length and directly proportional to its area of cross-section.
(d) directly proportional to the product of its area of cross-section and length.
Option a – directly proportional to its length and inversely proportional to its area of cross-section
Assertion (A) The coulomb force is the dominating force in the universe. Reason (R) The Coulomb force is stronger than the gravitational force. Codes
(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 are located in a uniform electric field. They will experience
(a) equal forces in the same direction.
(b) equal forces in opposite directions.
(c) equal acceleration in opposite direction.
(d) acceleration equal in magnitude.
Option b – equal forces in opposite directions
Electric field lines
(a) can never intersect.
(b) do not start 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 the electric dipole moment is
(a) Volt
(b) Joule
(c) Coulomb/m
(d) Coulomb-m
Option d – Coulomb-m
…. is 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 passes from one point to the other in a circuit. If the potential difference between the two points is 5V, the amount of 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 in between the plates, has capacitance C. Now, the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then, the value of the capacitance will become
(a) C
(b) C/7
(c) 7C
(d) 14 C
Option c – 7C
Which one of the following can charge an insulator?
(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 bring your finger near the metallic handle of a door, an electric shock is produced. This is because
(a) charge is transferred from your body to the handle.
(b) a chemical reaction occurs when you touch the handle.
(c) the temperature of the human body is higher than that of the handle.
(d) the human body and the handle arrive at thermal equilibrium through the process.
Option a – charge is transferred from your body to the handle
What is the process of transferring charge from a charged object to the Earth called? ( MCQ on Electric Current )
(a) Discharging
(b) Earthing
(c) Interaction
(d) Lightning
Option b – Earthing
Which law of physics states that the force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled?
(a) Coulomb’s Law
(b) Pascal’s Law
(c) Stefan’s Law
(d) Hooke’s Law
Option a – Coulomb’s Law
We covered all the mcq on electric current above in this post for free so that you can practice well for the exam.
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