# Ohm’s Law Multiple Choice Questions and Answers (MCQs) Short Quiz Ohm’s Law (Formula) is the most important law of electricity if we talk about the basic concept of Electronics because it defines the relationship between the current, resistance and voltage. I am providing you Multiple Choice Questions and Answers (MCQs) on Ohm’s Law with the commitment to facilitate the students, technicians and teachers of different technical fields for the sake of test/interview or any quiz throughout the world.

Read More: MCQs on Types of Resistors

## Ohm’s Law – Definition

According to the simplest definition of ohm’s law is current (I) is directly proportional to the Voltage (V) and inversely proportional to the Resistance (R).

### Ohm’s Law MCQs (Multiple Choice Questions and Answers)

Q1. The relationship between current, resistance and voltage is determined by  _______________.

1. Georg Simon Ohm (1826 AD)

Q2. In the Ohm’s Law, Current (I) is ___________  proportional to the Resistance (R).

1. Directly
2. Indirectly

Q3. In the Ohm’s Law, Current (I) is ___________  proportional to the Voltage (V).

1. Directly
2. Indirectly

Q4. Ohm’s law formula is __________________.

1. I = V/R
2. V = IR
3. R = V/I
4. All are correct

Q5. When 500 Voltage (V) applied to the 2KΩ Resistance (R) then what will be Current (I) according to the Ohm’s Law.

1. 0.50 Amp
2. 0.25 Amp
3. 0.75 Amp
4. 4 Amp

Q6. What is the Resistance (R) _____________ of a bulb when draws 0.25A from a 24V battery Source?

1. 75Ω
2. 96Ω
3. 85Ω
4. 88Ω

Q7. The Unit of Current (I) is _______________.

1. Ohm
2. Ampere
3. Volt
4. Siemen

Q8. The Unit of Resistance (R) is _______________.

1. Ohm
2. Ampere
3. Volt
4. Siemen

Q9. The Unit of Voltage (V) is _______________.

1. Siemen
2. Volt
3. Ohm
4. Ampere

Q10. 1mA is equal to _______________.

1. 100µA
2. 10µA
3. 1000µA
4. 10A

Q11. The Resistance of the Tungsten filament in a light-bulb is _________.

1. Linear
2. Non-Linear
3. Fixed
4. a & b are correct

Q12. Most common types of non-linear resisters are ___________________.

1. Thermistor Resistor
2. Varistor Resistor
3. Photo Resistor or LDR Resistor
4. Surface Mount (SMD) Resistor
5. All are correct
6. a & b are correct

Q13. A graph of Current (I) versus Resistance (R) with Voltage (V) constant is called a ____________.

1. Ordinate
2. Hyperbola
3. Abscissa
4. All are correct

Q14. The unit of electric power is watt which name is the honour for Scottish inventor _______________

1. James Watt (1736–1819)
2. Alexander Graham Bell (1847–1922)
3. Otto Blathy (1860–1939)
4. Walter Houser Brattain (1902–1987)

Q15. One horse power is equal to ____________________.

1. 576 watt
2. 796 watt
3. 746 watt
4. 646 watt

Q16. The _________ is a basic unit of work or energy.

1. Watt
2. Joule
3. Kelvin
4. Tesla

Q17. Power Formula is equal to _________________.

1. P = E/T
2. P = W/T
3. P = W/ΔT
4. All are correct

Q18. The SI unit of work or energy is the joule which name is the honour for English physicist _______________.

1. James Prescott Joule (1818–1889)
2. James Watt (1736–1819)
3. Alexander Graham Bell (1847–1922)
4. Walter Houser Brattain (1902–1987)

Q19. One joule (J) is equal to one ____________.

1. Volt-Coulomb
2. Joule-Coulomb
3. Horsepower
4. Ampere-Joule

Q20. One joule is equal to _____________eV .

1. 6.25 × 1018
2. 7.45 × 1018
3. 6.25 × 1033
4. 6.25 × 10-18

Q21. The power dissipated by a resistance is directly proportional to _______________.

1. V2
2. I2
3. V
4. a & b are correct

Q22. The electric shock of 0.1 to 0.2 Amp can cause the _______________.

1. Mild sensation
2. Threshold of sensation
3. Death
4. Painful

Q23. The resistance in the open circuit is _________________

1. Infinitely low
2. Infinitely High
3. Zero
4. a & b are correct

Q24. An open circuit has zero current.    T/F

Q25. The resistance in the short circuit is _________________

1. Infinitely low
2. Infinitely High
3. Zero
4. a & b are correct