Ohms Law Mcqs - Electrical Engineering MCQs
"Test your understanding of Ohm's Law with this collection of multiple-choice questions! From basic concepts to practical applications, these MCQs are designed to help you master the relationship between voltage, current, and resistance. Perfect for students, learners, or anyone looking to refresh their knowledge of electrical principles."
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1. Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law?
a) Capacitorsb) Inductors
c) Transistors
d) Resistance
Ans : C Explanation :- Resistor Inductor and Capacitor only work on Ohm's Law
2. Which of the following according to fundamentals of electrical energy is incorrect about alternating current?
a) Frequency is zero
b) Magnitude changes with time
c) Can be transported to larger distances with less loss in power
d) Flows in both directions
a) Frequency is zero
b) Magnitude changes with time
c) Can be transported to larger distances with less loss in power
d) Flows in both directions
Answer: a
Explanation: An alternating current changes its value with time and flows in both directions. The loss in power is less due to alternating current properties and thus, can be transported to larger distances.
Explanation: An alternating current changes its value with time and flows in both directions. The loss in power is less due to alternating current properties and thus, can be transported to larger distances.
3. What will be the direction of the drift velocity of electrons change with respect to the electric field?
a) same as that of electric field
b) opposite to that of electric field
c) perpendicular to that of the electric field in a positive direction
d) perpendicular to that of the electric field in a negative direction
a) same as that of electric field
b) opposite to that of electric field
c) perpendicular to that of the electric field in a positive direction
d) perpendicular to that of the electric field in a negative direction
Answer: b
Explanation: Basically drift velocity can be said to be the average velocity obtained by the free electrons in metal when an electric field is applied. The direction of drift velocity for the electrons present in metal will be opposite to that of the applied electric field.
Explanation: Basically drift velocity can be said to be the average velocity obtained by the free electrons in metal when an electric field is applied. The direction of drift velocity for the electrons present in metal will be opposite to that of the applied electric field.
4. What is zero for a charged spherical shell?
a) Electrical potential outside the spherical shell
b) Electrical potential inside the spherical shell
c) Electrical field outside the spherical shell
d) Electrical field inside the spherical shell
a) Electrical potential outside the spherical shell
b) Electrical potential inside the spherical shell
c) Electrical field outside the spherical shell
d) Electrical field inside the spherical shell
Answer: d
Explanation: According to the fundamentals of the electrical field inside the spherical shell is zero and this is known as electrostatic shielding. The electric field outside the sphere is inversely proportional to the square of the radius.
Explanation: According to the fundamentals of the electrical field inside the spherical shell is zero and this is known as electrostatic shielding. The electric field outside the sphere is inversely proportional to the square of the radius.
5. What do crowded lines of force indicate?
a) Strong electric field
b) Weak electric field
c) Strong electric potential
d) Weak electric potential
a) Strong electric field
b) Weak electric field
c) Strong electric potential
d) Weak electric potential
Answer: a
Explanation: According to the principles of electric fields, when crowded lines of field are present the electric fields are very strong. The strong electric field can be witnessed near the poles of a magnet as the lines of force are crowded in this region.
Explanation: According to the principles of electric fields, when crowded lines of field are present the electric fields are very strong. The strong electric field can be witnessed near the poles of a magnet as the lines of force are crowded in this region.
6. Which of the following will happen in a transformer when the number of secondary turns is less than the number of primary turns?
a) The voltage gets stepped up
b The voltage gets stepped down
c) The power gets stepped up
d) The power gets stepped down
a) The voltage gets stepped up
b The voltage gets stepped down
c) The power gets stepped up
d) The power gets stepped down
Answer: b
Explanation: The voltage transformation ratio is basically the ratio of the number of secondary turns to that of the number of primary turns. When the transformation ratio is less than 1, the step-down operation occurs.
Explanation: The voltage transformation ratio is basically the ratio of the number of secondary turns to that of the number of primary turns. When the transformation ratio is less than 1, the step-down operation occurs.
7. Who defined electric current and devised a method to measure current?
a) Michael Faraday
b) Andre-Marie Ampere
c) Nikola Tesla
d) Alessandro Antonio Volta
a) Michael Faraday
b) Andre-Marie Ampere
c) Nikola Tesla
d) Alessandro Antonio Volta
Answer: b
Explanation: Andre-Marie Ampere is a French physicist and mathematician who defined electric current and devised a method to measure current in the 1820s.
Explanation: Andre-Marie Ampere is a French physicist and mathematician who defined electric current and devised a method to measure current in the 1820s.
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