# A level south west regional mock gce 2022 physics 2

### A level south west regional mock gce 2022 physics 2

A level south west regional mock gce 2022 physics 2

Section 1: (One hour). Answer all the questions
1. a) The EMF of a thermocouple is given approximately by the equation: E— ctA I + P(AT) , where AT is the
thermodynamic temperature difference between the junctions. Given that the equation is homogeneous,
determine the base units of the constants a and p.
^ 9
(b) Given that the values of the constants a and P in SI units are 6.93 x 10 and -2.10 x 10 respectively, and
that the temperature of the cold junction is 273 K, calculate the probable temperature of the hot junction when
E = 3.25 mV. (6 marks)
2. A highly insulated calorimeter contains 0.050 kg of ice and 0.10 kg of water. Steam at 100 C is passed in
until the iceJust melts. Determine the:
a) quantity of water now in the container.
b) equilibrium temperature attained by the mixture if the mass of the steam is doubled
3. U-235 and U-238 are both isotopes of the same element
a) Explain the meaning of the bolded word
b) In the fission of U-235 energy is released. |2|<7 + In = f°Kr + 1te^a + 2In
Calculate the amount of energy released given that
2llU = 235.004 u; In = 1.009 u; fgtfr = 89.920 u; x\\Ba = 153.923 u . (5 marks)
4. a) State the laws of Electromagnetic induction.
(b)You are provided with a bar magnet, a centre- zero galvanometer, a long copper wire (about 150 cm long).
With the aid of a diagram, explain briefly how any of the above laws can be investigated.