Skip to content

Course home

3.2 Internal energy and energy transfers

3.2 Internal energy and energy transfers

EasyMedium
123456
Question 6

An electronic micro-heating element is used in a scientific instrument to melt a small calibration pellet of indium.

a.

Write down the equation that links charge flow, current, and time.

[1]
b.

During a calibration cycle, a charge of 3.15 C flows through the heating element in 1.40 s. Calculate the current in the heating element during this time.

[2]
c.

The mass of the indium pellet is 0.015 kg. The specific latent heat of fusion of indium is 28 000 J/kg28\,000\text{ J/kg}28000 J/kg. Calculate the thermal energy needed to melt this pellet of indium using the equation:

E=m×L E = m \times L E=m×L
[2]
Markscheme

3.2 Internal energy and energy transfers Questions

  1. GCSE
  2. /Physics
  3. /3.2 Internal energy and energy transfers

37 exam-style questions on AQA GCSE Physics 3.2 Internal energy and energy transfers, covering 3.2.1 Internal energy, 3.2.2 Temperature changes in a system and specific heat capacity, and 3.2.3 Changes of state and specific latent heat. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank