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, **R**_{eq }is** always more than **any of the** individual resistances.**

_{eq }

## 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= R
_{1}+R_{2}+R_{3}
- Thus, the equivalent resistance is greater than the largest resistance.

_{1}+R_{2}+R_{3}### 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