A current of 0.25 A flows for 2.0 minutes. How much charge passes?
From Paper 1: Advanced Physics I
51 mark
Kirchhoff's first law is a consequence of conservation of:
From Paper 1: Advanced Physics I
61 mark
As the temperature of an NTC thermistor rises, its resistance:
From Paper 1: Advanced Physics I
13(a)4 marks
An LDR and a 10 kΩ resistor are connected in series across a 9.0 V supply. The output is taken across the LDR. The LDR's resistance is 50 kΩ in the dark and 2.0 kΩ in bright light. Calculate the output voltage in each case.
From Paper 1: Advanced Physics I
13(b)3 marks
A copper wire of cross-sectional area 1.0 × 10⁻⁶ m² carries 2.0 A. Copper has 8.5 × 10²⁸ free electrons per m³. Calculate the drift velocity.
From Paper 1: Advanced Physics I
13(c)*6 marks
Explain why the resistance of a metal filament lamp increases as the current through it increases, but the resistance of an NTC thermistor decreases as its temperature increases.
From Paper 3: General and Practical Principles in Physics
5(a)2 marks
An electric car's battery stores 60 kWh. Convert this to joules.
From Paper 3: General and Practical Principles in Physics
5(b)4 marks
At a steady 25 m s⁻¹ the total resistive force is 600 N. The motor system is 90% efficient. Calculate the range of the car at this speed.
From Paper 3: General and Practical Principles in Physics
5(d)3 marks
The car is charged at 400 V and 125 A. Calculate the time to fully charge the battery and explain why the charging cables are thick.
Score 0 / 25 · 0 of 9 marked
This paper is written by Plasmo in the style of the Edexcel A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.
Electric circuits Exam Questions: Edexcel A-Level Physics | Plasmo