Solved Ohm_s Law and Resistance (Current

Ohm_s Law and Resistance MCQs for Competitive Exams

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Topic Notes: Ohm_s Law and Resistance

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Given two wires of identical length and cross-sectional area, one made of copper and one of aluminium, how do their resistances compare, knowing copper has higher electrical conductivity?

The resistance of wire 2 will be higher than that of wire 1

The resistance of wire 1 will be higher than that of wire 2

If same current is flown through both the wires, the power dissipated in both the wires will be the same

The resistance of both the wires will be the same

Report

Which physical parameters determine the electrical resistance of a wire?

cross sectional area only

volume

length only

cross sectional area and length

Report

What are the two primary types of electrical circuit connections?

two

four

three

one

Report

When multiple resistors are connected between the same two nodes, what is the term for this configuration?

range

parallel

across

line

Report

Which of the following statements accurately describes Ohm's Law?

The amount of electric current flowing in a wire is inversely proportional to the length of the wire

The amount of electric current flowing in a wire is proportional to the voltage difference between the ends of the wire

The amount of current flowing in a wire is inversely proportional to the voltage difference between the ends of the wire

The amount of electric current flowing in a wire is proportional to the resistance of the wire

Report

Which material is generally considered the most suitable for manufacturing electrical connecting wires?

silver

copper

iron

tungsten

Report

Which of the following sequences correctly represents materials arranged in order of decreasing electrical conductivity?

Copper, silver, aluminium, steel

Aluminium, silver, copper, stee

Silver, copper, aluminium, steel

Copper, aluminium, steel, silver

Report

What is the typical range of resistivity for electrical insulators?

1012Ωm to 1017Ωm

106Ωm to 108Ωm

10-12Ωm to 10-17Ωm

108Ωm to 106Ωm

Report

Which of the following statements regarding the limitations or definition of Ohm's Law is incorrect?

Ohm's law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it

All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong

A conducting material obeys Ohm's law when the resistance of material is independent of the magnitude and direction of applied electric field

A conducting device obeys Ohm's law when the resistance of a device is independent of magnitude and polarity of applied potential difference

Report

How does the electric current behave when multiple resistors are connected in a series configuration within a circuit?

Decreases

Increases

Becomes half

Remains the same

Report

Ohm_s Law and Resistance MCQs for Competitive Exams

Ohm_s Law and Resistance MCQs for Competitive Exams

Topic Notes: Ohm_s Law and Resistance

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