4.
[10]
a. In the following circuit determine the values of 11, 12 and 13-
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50
Loop i 12V
10 9
LA
E
+
I
200
E
I
b. A 60-volts potential difference is applied to the circuit below.
i. Find the equivalent resistance of the circuit,
i. The current in the circuit,
iii. The current in the 10-ohm resistor.
131
[2]
[3]
c. Calculate the resistance per unit length of a 22-gauge Nichrome wire of
radius 0.321 mm.
[2]

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.