Podcast
Questions and Answers
When identical cells are connected in series, the total voltage across the cells is:
When identical cells are connected in series, the total voltage across the cells is:
- Equal to the sum of the individual voltages of the cells (correct)
- Equal to the product of the individual voltages of the cells
- Equal to the voltage of one cell
- Depends on the internal resistance of the cells
In a potential divider circuit, which of the following is NOT a purpose of the variable resistor?
In a potential divider circuit, which of the following is NOT a purpose of the variable resistor?
- To produce a required fraction of the source potential difference
- To vary the potential difference output
- To provide a constant potential difference output (correct)
- To conserve charge and energy in the circuit
According to Kirchhoff's second law, the sum of all the voltages in a series circuit is equal to:
According to Kirchhoff's second law, the sum of all the voltages in a series circuit is equal to:
- The battery voltage (correct)
- The current flowing through the circuit
- The total resistance of the circuit
- The sum of the individual cell voltages
In a DC circuit, which of the following is NOT conserved?
In a DC circuit, which of the following is NOT conserved?
When identical cells are connected in parallel, the total voltage across the cells is:
When identical cells are connected in parallel, the total voltage across the cells is:
According to Kirchhoff's first law, the total current flowing into a junction is:
According to Kirchhoff's first law, the total current flowing into a junction is:
If the resistance across R1 in the circuit increases, what will happen to the output potential difference?
If the resistance across R1 in the circuit increases, what will happen to the output potential difference?
How does the resistance of a light dependent resistor (LDR) change with increasing light intensity?
How does the resistance of a light dependent resistor (LDR) change with increasing light intensity?
What effect does switching the positions of the LDR and resistor in the circuit have on the output potential difference?
What effect does switching the positions of the LDR and resistor in the circuit have on the output potential difference?
How is internal resistance (r) in batteries primarily caused?
How is internal resistance (r) in batteries primarily caused?
What is the main reason why some energy is lost inside a battery due to internal resistance?
What is the main reason why some energy is lost inside a battery due to internal resistance?
In a circuit where a battery has an internal resistance, how does this affect the terminal potential difference compared to an ideal battery?
In a circuit where a battery has an internal resistance, how does this affect the terminal potential difference compared to an ideal battery?
What is the terminal p.d. across the resistor R₁?
What is the terminal p.d. across the resistor R₁?
What is the value of the lost volts across the internal resistance r?
What is the value of the lost volts across the internal resistance r?
What is the total resistance RT of the circuit?
What is the total resistance RT of the circuit?
If the internal resistance r is 0.5 Ω and the current I is 2 A, what is the emf of the cell?
If the internal resistance r is 0.5 Ω and the current I is 2 A, what is the emf of the cell?
If the terminal p.d. V across R₁ is 7 V and the resistance of R₁ is 3.5 Ω, what is the current flowing through R₁?
If the terminal p.d. V across R₁ is 7 V and the resistance of R₁ is 3.5 Ω, what is the current flowing through R₁?
If the emf of the cell is 10 V and the total resistance RT is 4 Ω, what is the current I flowing through the circuit?
If the emf of the cell is 10 V and the total resistance RT is 4 Ω, what is the current I flowing through the circuit?
