The exam consists of 28 multiple choice question, the main atm, of the exam is t

Question

The exam consists of 28 multiple choice question, the main atm, of the exam is to evaluate the students in the following 10 experiments given in General Physics Lab The Electrochemical Equivalent of Copper: In the experiment of the Electrochemical Equivalent of Copper. a) The mess of the cathode increases due to deposition of (SO_4^-2)ions. b) The mass of the cathode increases due to the deposition of (Cu^+2) ions c) The mass of the anode increases dim to the deposition of (Cu^+2) ions d) The mass of the anode increases due to the deposition of (SO_4^-2) ions A student performed the experiment and got that the electrochemical equivalent of copper is K 3.4 times 10 Given that the atomic weight of copper It A = 63.54 g. and the Avogadro's number N_0 = 6.022 times 10^23, then the value of the charge of electron e(in C) is a) 1.55 times 10^-19 b) 1.70 times 10^-19 c) 1.65 times 10^-19 d) 1.51 times 10^-19 From the graph, the value of electric field (in V/m) is: a) 0.2 b) 0.4 c) 0.8 d) 0.6 In the given figure, the lines labeled by 1 and 2 are a) Equipotential lines b) Electric field lines c) Equipotential lines and electric field lines respectively d) Electric field lines and equipotential lines respectively

Explanation / Answer

3) 4/5= 0.8 V/m Option c

4)These are electric field lines ,They point from positive charge to the negative charge.

2) 63.54(0.5) /6.022*10^23 = 0.5*1.0215*10^-22 g is the mass of one Atom

So charge = 0.5*1.0215*10^-22/(3.4*10^-4) = 1.5*10^-19 C

1) Seems to be of chemistry !

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