Podcast
Questions and Answers
What is the physical quantity that can be measured by a voltmeter?
What is the physical quantity that can be measured by a voltmeter?
- Potential difference
- Voltage (correct)
- Electromotive force
- Internal resistance
In an opened circuit where there is no current flow, what is the reading of the voltmeter equivalent to?
In an opened circuit where there is no current flow, what is the reading of the voltmeter equivalent to?
- Voltage drop
- Electromotive force (correct)
- Internal resistance
- Charge
What happens to the voltmeter reading in a closed circuit with current flow compared to the reading in an opened circuit?
What happens to the voltmeter reading in a closed circuit with current flow compared to the reading in an opened circuit?
- It fluctuates
- It remains the same
- It decreases (correct)
- It increases
What is the formula that relates voltage, current, and internal resistance in a circuit?
What is the formula that relates voltage, current, and internal resistance in a circuit?
When current is zero in a circuit, what is the value of the effective internal resistance?
When current is zero in a circuit, what is the value of the effective internal resistance?
What is the relationship between the gradient of a voltage-current graph and the internal resistance?
What is the relationship between the gradient of a voltage-current graph and the internal resistance?
How does connecting dry cells in parallel affect the effective internal resistance?
How does connecting dry cells in parallel affect the effective internal resistance?
What happens to the reading of a voltmeter when there is current flow in a circuit?
What happens to the reading of a voltmeter when there is current flow in a circuit?
How does connecting dry cells in series impact total emf and effective internal resistance according to the text?
How does connecting dry cells in series impact total emf and effective internal resistance according to the text?
When the number of turns of the solenoid is high, what can be said about the deflection of the galvanometer pointer?
When the number of turns of the solenoid is high, what can be said about the deflection of the galvanometer pointer?
In the context of the diagrams, what happens to the rate of cutting of the magnetic flux when the number of turns of the solenoid is low?
In the context of the diagrams, what happens to the rate of cutting of the magnetic flux when the number of turns of the solenoid is low?
If there is an increase in the rate of cutting of magnetic flux, what can be expected to happen to the magnitude of induced current produced?
If there is an increase in the rate of cutting of magnetic flux, what can be expected to happen to the magnitude of induced current produced?
In Diagram 4.2, what can be inferred about the relationship between the number of turns of the solenoid and the deflection of the galvanometer pointer?
In Diagram 4.2, what can be inferred about the relationship between the number of turns of the solenoid and the deflection of the galvanometer pointer?
When a bar magnet is pushed into two identical solenoids, what magnetic pole is present at end P according to Diagram 4.1?
When a bar magnet is pushed into two identical solenoids, what magnetic pole is present at end P according to Diagram 4.1?
What is the impact on the strength of the magnetic field when there are more bar magnets present?
What is the impact on the strength of the magnetic field when there are more bar magnets present?
How does a change in the strength of the magnetic field affect the deflection of the galvanometer?
How does a change in the strength of the magnetic field affect the deflection of the galvanometer?
'Faraday’s Law' is associated with which aspect observed in Diagram 4.2?
'Faraday’s Law' is associated with which aspect observed in Diagram 4.2?
What can be concluded about the relationship between the number of magnets and galvanometer deflection?
What can be concluded about the relationship between the number of magnets and galvanometer deflection?
Which diagram displays a scenario where 'rate of cutting of magnetic flux' increases?
Which diagram displays a scenario where 'rate of cutting of magnetic flux' increases?
