GCSE Electricity- Resistance of a wire

What is the formula for calculating resistance in a wire?

• Voltage divided by current
• Current divided by voltage
• Voltage times current
• Current times resistance

Which material is known to have the highest conductivity?

• Copper
• Rubber
• Wood
• Iron

What happens to the resistance of a wire if its length is doubled?

• It quadruples
• It remains the same
• It halves
• It doubles

Which factor does NOT affect the resistance of a wire?

• The thickness of the wire
• The length of the wire
• The temperature of the wire
• The colour of the wire

What is the unit of resistance?

• Ampere
• Volt
• Watt
• Ohm

If the temperature of a conductor increases, what happens to its resistance?

• It fluctuates
• It stays the same
• It decreases
• It increases

What is the effect of increasing the cross-sectional area of a wire on its resistance?

• It decreases resistance
• It increases resistance
• It has no effect
• It doubles resistance

Which of the following statements is true about series circuits?

• Total resistance is the same as the largest resistance
• Total resistance is zero
• Total resistance is less than the smallest resistance
• Total resistance is the sum of individual resistances

What is the term for materials that do not conduct electricity well?

• Superconductors
• Semiconductors
• Conductors
• Insulators

In a parallel circuit, how does the total resistance compare to the individual resistances?

• Total resistance is zero
• Total resistance is the sum of individual resistances
• Total resistance is equal to the largest resistance
• Total resistance is less than the smallest resistance