Ohms Law -Multiple Choice Questions Quiz

Interactive MCQs on “Ohms Law”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What does Ohm's Law state?

(a) The resistance of a conductor is directly proportional to its length and inversely proportional to its area of cross-section.
(b) The current passing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance.
(c) The voltage across a conductor is directly proportional to the current passing through it and inversely proportional to its resistance.
(d) The voltage across a conductor is directly proportional to its length and inversely proportional to its resistivity.

Question 2: What is the unit of electrical resistance?

(a) Ohm (Ω)
(b) Volt (V)
(c) Ampere (A)
(d) Watt (W)

Question 3: Which of the following materials has the highest electrical resistance?

(a) Copper
(b) Silver
(c) Aluminum
(d) Nichrome

Question 4: If the current through a resistor is 2 amperes, and the voltage across it is 10 volts, what is the resistance of the resistor?

(a) 5 Ω
(b) 8 Ω
(c) 12 Ω
(d) 20 Ω

Question 5: What happens to the current through a resistor if the voltage across it is doubled while keeping the resistance constant?

(a) The current is halved
(b) The current is quadrupled
(c) The current remains the same
(d) The current is doubled

Question 6: What happens to the resistance of a conductor if its length is doubled while keeping the area of cross-section constant?

(a) The resistance is doubled
(b) The resistance is halved
(c) The resistance remains the same
(d) The resistance is quadrupled

Question 7: In which type of circuit does Ohm's Law apply?

(a) Series circuit only
(b) Parallel circuit only
(c) Both series and parallel circuits
(d) Complex circuits with resistors and capacitors

Question 8: If the resistance of a circuit is increased while keeping the voltage constant, what happens to the current?

(a) The current increases
(b) The current decreases
(c) The current remains the same
(d) The current becomes zero

Question 9: What is the relationship between resistance and cross-sectional area of a conductor, assuming its length and resistivity remain constant?

(a) Resistance is directly proportional to the cross-sectional area.
(b) Resistance is inversely proportional to the cross-sectional area.
(c) Resistance remains unaffected by the cross-sectional area.
(d) Resistance varies linearly with the cross-sectional area.

Question 10: If a resistor has a resistance of 100 Ω and a current of 0.5 amperes passes through it, what is the voltage across the resistor?

(a) 0.5 V
(b) 20 V
(c) 50 V
(d) 200 V