Physics
Grade-9
Easy
Question
Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
- The equivalent resistance is equal to the average of the four resistances.
- The equivalent resistance is less than that of the smallest resistor.
- The equivalent resistance is less than that of the largest resistor.
- The equivalent resistance is more than the largest resistance.
Hint:
The equivalent resistance of N unequal resistors connected in series is equal to the sum of the individual resistances.
As a consequence, Req is always more than any of the individual resistances.
The correct answer is: The equivalent resistance is more than the largest resistance.
In a circuit with unequal or different resistors, the equivalent resistance is more than the largest resistance.
- For any circuit that is connected with the resistors, the equivalent resistance is the sum total of all the resistances.
- This can be calculated as R= R1+R2+R3
- Thus, the equivalent resistance is greater than the largest resistance.
Related Questions to study
Physics
In parallel combination of resistors, the amount of current in the circuit
In parallel combination of resistors, the amount of current in the circuit
PhysicsGrade-9
Physics
In a series combination of resistors, the amount of current in the circuit
In a series combination of resistors, the amount of current in the circuit
PhysicsGrade-9
Physics
Equivalent resistance of the resistors connected in series is __________ individual resistances in the circuit.
Equivalent resistance of the resistors connected in series is __________ individual resistances in the circuit.
PhysicsGrade-9
Physics
Magnitude of current across each resistor in a series combination
Magnitude of current across each resistor in a series combination
PhysicsGrade-9
Physics
In a series circuit, the total resistance is greater than the largest resistance in the circuit.
In a series circuit, the total resistance is greater than the largest resistance in the circuit.
PhysicsGrade-9
Physics
Pick out the correct statement from the following about the parallel combination of resistors.
Pick out the correct statement from the following about the parallel combination of resistors.
PhysicsGrade-9
Physics
The equivalent overall resistance is smaller than the smallest parallel resistor in a parallel connection. This statement is ____.
The equivalent overall resistance is smaller than the smallest parallel resistor in a parallel connection. This statement is ____.
PhysicsGrade-9
Physics
What is the equivalent resistance of a series combination of three resistors?
What is the equivalent resistance of a series combination of three resistors?
PhysicsGrade-9
Physics
An electrician installs patio lights in a back yard. Which of the following will increase the efficiency of the wiring system to the back yard?
1- Bury the extension cord deep underground.
2- Use a shorter extension cord.
3- Use a longer extension cord.
4- Use compact fluorescent patio lights
An electrician installs patio lights in a back yard. Which of the following will increase the efficiency of the wiring system to the back yard?
1- Bury the extension cord deep underground.
2- Use a shorter extension cord.
3- Use a longer extension cord.
4- Use compact fluorescent patio lights
PhysicsGrade-9
Physics
30 Joules of energy enter a light bulb. 20 joules of energy are transformed into light, how much energy is dissipated as heat?
30 Joules of energy enter a light bulb. 20 joules of energy are transformed into light, how much energy is dissipated as heat?
PhysicsGrade-9
Physics
The total resistance in a circuit is equal to the sum of the inverse of each individual resistance.
The total resistance in a circuit is equal to the sum of the inverse of each individual resistance.
PhysicsGrade-9
Physics
Total resistance is the algebraic sum of the resistance across each resistor in
Total resistance is the algebraic sum of the resistance across each resistor in
PhysicsGrade-9
Physics
Total voltage is the sum of the voltage across each resistor in
Total voltage is the sum of the voltage across each resistor in
PhysicsGrade-9
Physics
An oven consumes 425 kWh of energy in order to provide 386 kWh of useful energy. What is its percent efficiency?
An oven consumes 425 kWh of energy in order to provide 386 kWh of useful energy. What is its percent efficiency?
PhysicsGrade-9
