1)Which of the following fundamental forces forces of nature is responsible for the existence of bulk matter?
a) force of gravity
b) electromagnetic force
c) nuclear strong force
d)nuclear weak force
2) Two charges
Q1=500μC
Q1=500μC
and
Q2=100μC
Q2=100μC
are located on the XY plane at the positions
r1=3j⃗
r1=3j→
m and
r2=4i⃗
r2=4i→
m . Find the force exerted on the
Q2
Q2
a)
14.4i⃗ +10.8j⃗
14.4i→+10.8j→
N
b)
14.4i⃗ –10.8j⃗
14.4i→–10.8j→
N
c)
10.8i⃗ –14.4j⃗
10.8i→–14.4j→
N
d)
10.8i⃗ +14.4j⃗
10.8i→+14.4j→
N
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