17V:=192) P
B
Consider the adjacent circuit
A generator G (174, 19)
Resistors R32 &R= 60
R
Arheostat Rh of variable resistance
An unknown electne component D.
An unmeter A, of negligible intemal resistance
I When the theostat is set to a resistance Rh=39, the
R₂
current flows through Ri is I = 1A.
a) The animerer A, has the following ranges: 6A, 3A, 300mA and 30mA
1) Which range is the most convenient to measure I,? Justify
2) To which division, using the most convenient range, will the needle of the ammeter deviate
if ils dial contains ISO divisions?
b) Calculate the resistant of the resistor equivalent to R, and Rs.
© Calculate the equivalent resistance between A and C.
© Find Vas
RI
2) Calculate la and I
) Calculate Vw and Ven
II) In this part, we vary the resistance of the rheostat. I and Uen across the terminals of D vary according
to the following table.
VN (V) 2.4
(А)
0.1
3.6
0.4
4
0.5
0.2
0 3
a) Draw the characteristic curve CV en D of D.
b) Deduce the nature of D.
C) Determine the characteristics of D.​

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?