multiple choice with explanation.
1- C (obvious)
2- B (obvious)
3- B (obvious)
4- C (obvious)
5- B (obvious)
6- C (back emf is induced through changing flux in lens's law)
7- C (calculation)
8- A (initially 1 due to reaction force, gradually increasing due to increased acceleration in loss of fuel mass, 0 one stopped)
9- B (obvious)
10- D (obvious)
11- D (obvious)
12- A (right hand rule)
13- A (group V dopant increases conductivity and electrons in conduction band)
14- A (measures EMF across x and y, which does exists as the flux is changing as it enters the field, but when in the field no flux is changing, when it leaves there is another change in flux. The emf is a potential and can exist without the flow of current.)
15- C (calculation)
16- B (v=sqrt(GM/r))
17- B (E=hf - W, f=c/y, E=hc/y - W, hyperbolic graph, y = wavelength)
18- B (calculation)
19- D (obvious)
20- C (since gpe decreases towards the center of mass, you decrease GPE as you move closer to the centre. Thus r=0.5r, thus 4 times the regular gravitational force.)
1- C (obvious)
2- B (obvious)
3- B (obvious)
4- C (obvious)
5- B (obvious)
6- C (back emf is induced through changing flux in lens's law)
7- C (calculation)
8- A (initially 1 due to reaction force, gradually increasing due to increased acceleration in loss of fuel mass, 0 one stopped)
9- B (obvious)
10- D (obvious)
11- D (obvious)
12- A (right hand rule)
13- A (group V dopant increases conductivity and electrons in conduction band)
14- A (measures EMF across x and y, which does exists as the flux is changing as it enters the field, but when in the field no flux is changing, when it leaves there is another change in flux. The emf is a potential and can exist without the flow of current.)
15- C (calculation)
16- B (v=sqrt(GM/r))
17- B (E=hf - W, f=c/y, E=hc/y - W, hyperbolic graph, y = wavelength)
18- B (calculation)
19- D (obvious)
20- C (since gpe decreases towards the center of mass, you decrease GPE as you move closer to the centre. Thus r=0.5r, thus 4 times the regular gravitational force.)