Ohm’s Law defines the relationship between which three electrical properties?
a) Voltage, Current, and Power
b) Voltage, Current, and Resistance
c) Power, Current, and Resistance
d) Voltage, Power, and Resistance
Which of the following is the formula for Ohm’s Law?
a) V = I × R
b) V = I / R
c) P = I × R
d) R = V / I
If the voltage across a resistor is 10V and the resistance is 2Ω, what is the current?
a) 5A
b) 2A
c) 10A
d) 20A
In a series circuit, the total resistance is:
a) The sum of individual resistances
b) The product of individual resistances
c) The average of individual resistances
d) The minimum resistance
In a parallel circuit, the total resistance is:
a) Always greater than the smallest resistance
b) The sum of individual resistances
c) The inverse of the sum of the reciprocals of individual resistances
d) The smallest resistance
If the current is 2A and the resistance is 5Ω, what is the voltage across the resistor?
a) 10V
b) 2V
c) 5V
d) 1V
What happens to the current if the resistance in an electrical circuit is increased, while the voltage remains constant?
a) The current increases
b) The current decreases
c) The current remains constant
d) The current fluctuates
If a 12V battery is connected to a 4Ω resistor, what is the current flowing through the resistor?
a) 3A
b) 48A
c) 16A
d) 2A
In a parallel circuit, if one resistor is removed, the total resistance:
a) Increases
b) Decreases
c) Remains the same
d) Becomes zero
The power dissipated in a resistor is given by the formula:
a) P = V × I
b) P = I² × R
c) P = V² / R
d) All of the above
In an electrical circuit, if the voltage is doubled and the resistance remains the same, what happens to the current?
a) The current stays the same
b) The current doubles
c) The current is halved
d) The current quadruples
The total voltage in a series circuit is the:
a) Average of individual voltages
b) Sum of individual voltages
c) Difference of individual voltages
d) Maximum of individual voltages
If the total power in a circuit is 100W and the current is 5A, what is the voltage?
a) 25V
b) 50V
c) 200V
d) 500V
If the voltage across a resistor is 12V and the power dissipated is 24W, what is the current?
a) 2A
b) 1A
c) 3A
d) 4A
Which of the following is the correct unit for resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
In a series circuit with resistors of 5Ω, 10Ω, and 15Ω, what is the total resistance?
a) 30Ω
b) 10Ω
c) 5Ω
d) 20Ω
In a parallel circuit with resistors of 4Ω, 6Ω, and 12Ω, what is the total resistance?
a) 3Ω
b) 2Ω
c) 4Ω
d) 1Ω
Which of the following describes the relationship between power and voltage in an electrical circuit?
a) Power is directly proportional to voltage
b) Power is inversely proportional to voltage
c) Power is independent of voltage
d) Power is proportional to the square of the voltage
What is the power dissipated in a resistor if the current is 4A and the resistance is 5Ω?
a) 20W
b) 16W
c) 80W
d) 2W
If a resistor has a current of 3A and a resistance of 6Ω, what is the voltage across it?
a) 18V
b) 9V
c) 6V
d) 3V
In a circuit with a 10Ω resistor and 5V applied voltage, what is the current?
a) 0.5A
b) 2A
c) 10A
d) 5A
If the total current in a series circuit is 10A and the total resistance is 2Ω, what is the voltage?
a) 20V
b) 10V
c) 5V
d) 0.2V
Which of the following does not affect the resistance of a conductor?
a) Temperature
b) Material
c) Length
d) Voltage
The resistance of a conductor is directly proportional to its:
a) Length
b) Cross-sectional area
c) Temperature
d) All of the above
Which of the following is true for Ohm’s Law?
a) It applies only to superconductors
b) It is valid for all materials
c) It is valid only for resistive materials
d) It applies to capacitors only
If the power in a circuit is doubled while the resistance remains constant, what happens to the current?
a) The current doubles
b) The current quadruples
c) The current is halved
d) The current remains the same
In a parallel circuit, the voltage across all resistors is:
a) Different for each resistor
b) The same for all resistors
c) Equal to the power
d) Inversely proportional to the current
In a series circuit, if one resistor fails, the entire circuit:
a) Continues to operate
b) Does not function
c) Has increased resistance
d) Will short-circuit
