PHYSICS GCSE END SEMESTER EXAM. ALL EXAM REVISION
QUESTIONS AND CORRECT ANSWERS (ALREADY GRADED A+) (2024
UPDATE) 100% GUARANTEED
Specific heat capacity - ANSWER- the energy required to raise the temperature of one gram of
a substance by one degree Celsius.
Change in thermal energy= - ANSWER- Mass x specific heat capacity x temperature change
Specific heat capacity units - ANSWER- J/kg°C.
The magnetic field around a straight wire - ANSWER- made up of concentric circles
The magnetic field around a flat circular coil - ANSWER- made up of concentric ellipses
The magnetic field around a solenoid - ANSWER- Similar to that of a bar magnet
A soft magnetic material... - ANSWER- does not retain its magnetism once magnetised
A hard magnetic material... - ANSWER- does retain its magnetism once magnetised
Flemming's left-hand rule - ANSWER- FBI
Factors that speed up a simple d.c electric motor - ANSWER- more current, more turns on the
coil, stronger magnetic field, a soft iron core
Electromagnetic induction - ANSWER- The creation of a voltage in a wire which is
experiencing a change in magnetic field
, The dynamo effect - ANSWER- Using electromagnetic induction to generate electricity using
energy from kinetic energy stores
(dynamo) how can you increase the voltage? - ANSWER- increase the strength of the magnet,
increase the speed of the movement, increase the number of turns on the coil
Step-up transformer - ANSWER- a transformer that increases voltage
Step-down transformer - ANSWER- a transformer that decreases voltage
The transformer equation - ANSWER- Vp/Vs = Np/Ns
Power in = power out - ANSWER- vpip = vsis
3 types of radioactive decay - ANSWER- alpha, beta, gamma
Background radiation - ANSWER- nuclear radiation that occurs naturally in the environment
Ionisation - ANSWER- Any process in which atoms become charged
Alpha particles are... - ANSWER- helium nuclei
Beta particles are... - ANSWER- electrons
Gamma rays are... - ANSWER- electromagnetic waves
Alpha particles are blocked by... - ANSWER- paper, skin, few cm of air
Beta particles are blocked by... - ANSWER- thin metal
Gamma rays are blocked by... - ANSWER- thick lead, very thick concrete
QUESTIONS AND CORRECT ANSWERS (ALREADY GRADED A+) (2024
UPDATE) 100% GUARANTEED
Specific heat capacity - ANSWER- the energy required to raise the temperature of one gram of
a substance by one degree Celsius.
Change in thermal energy= - ANSWER- Mass x specific heat capacity x temperature change
Specific heat capacity units - ANSWER- J/kg°C.
The magnetic field around a straight wire - ANSWER- made up of concentric circles
The magnetic field around a flat circular coil - ANSWER- made up of concentric ellipses
The magnetic field around a solenoid - ANSWER- Similar to that of a bar magnet
A soft magnetic material... - ANSWER- does not retain its magnetism once magnetised
A hard magnetic material... - ANSWER- does retain its magnetism once magnetised
Flemming's left-hand rule - ANSWER- FBI
Factors that speed up a simple d.c electric motor - ANSWER- more current, more turns on the
coil, stronger magnetic field, a soft iron core
Electromagnetic induction - ANSWER- The creation of a voltage in a wire which is
experiencing a change in magnetic field
, The dynamo effect - ANSWER- Using electromagnetic induction to generate electricity using
energy from kinetic energy stores
(dynamo) how can you increase the voltage? - ANSWER- increase the strength of the magnet,
increase the speed of the movement, increase the number of turns on the coil
Step-up transformer - ANSWER- a transformer that increases voltage
Step-down transformer - ANSWER- a transformer that decreases voltage
The transformer equation - ANSWER- Vp/Vs = Np/Ns
Power in = power out - ANSWER- vpip = vsis
3 types of radioactive decay - ANSWER- alpha, beta, gamma
Background radiation - ANSWER- nuclear radiation that occurs naturally in the environment
Ionisation - ANSWER- Any process in which atoms become charged
Alpha particles are... - ANSWER- helium nuclei
Beta particles are... - ANSWER- electrons
Gamma rays are... - ANSWER- electromagnetic waves
Alpha particles are blocked by... - ANSWER- paper, skin, few cm of air
Beta particles are blocked by... - ANSWER- thin metal
Gamma rays are blocked by... - ANSWER- thick lead, very thick concrete
