required practical resistance of a wire
Cards (25)
- In this practical, what specific factor affecting resistance are we focusing on?
- What equipment is used to investigate the effect of wire length on resistance?
- What does the ammeter measure in the circuit?
- What does the voltmeter measure across the wire?
- In what units is resistance measured?
- In what units is potential difference measured?
- In what units is current measured?
- How can the length of the wire in the circuit be increased in this experiment?
- What does the straight line passing through zero on the graph of resistance vs. length tell us?
- What is indicated by a small resistance when the length of the wire is zero?
- What is a zero error?
- What type of error is a zero error?
- Can a zero error be reduced by carrying out repeats?
- What must be done to all resistance readings in the presence of a zero error?
- Why is it difficult to get the crocodile clip at the zero position on the ruler?
- What causes zero error in this experiment?
- Besides placement on the ruler, what else causes zero error?
- What effect does increasing the temperature of the wire have on resistance?
- How can heating effects be reduced in this experiment?
- How does a low potential difference reduce heating in the wire?
- What device utilizes the principle of changing wire length to control resistance?
- How can we increase the resistance in a circuit?
- What is the role of the slider on a variable resistor?
- What effect does increasing the resistance have on the potential difference across the bulb?
- In the circuit with a lamp and variable resistor, what happens to the lamp when resistance increases?