1) Check suitable unit/s of Power. [20 points] a) Watt b) Ampere-Volt c) Ampere^
ID: 1422742 • Letter: 1
Question
1) Check suitable unit/s of Power. [20 points]
a) Watt
b) Ampere-Volt
c) Ampere^2 / Ohm
d) Volt^2 / Ohm
e) Killogram. Meter^2 / Second^3
2) An electrical circuit had a load, then a second load is added in parallel, what happens to the total current?
a) decreases
b) remains the same
c) increases
3) Two parallel conductors( length 0.8 m each) are at the distance of 2 cm. First wire carries current of 1.2 A and the next 5 A in opposite direction. What is the force between them. [60 Points]
Explanation / Answer
1) suitable units are
a) watt
B) Ampere-volt
D) volt^2/ohm
e) Kilogram*Meter^2/Second^3
2) in parallel combination resistance decreases,hence current increases
3)
since the currents are in opposite directions then
they repel each other
F = mu_0*i1*i2*l/(2*pi*r) = (2*10^-7*1.2*5*0.8)/(0.02) = 4.8*10^-5 N
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