1) Calculate the potential difference between the plates of a parallel plate capacitor so that the gravitational force on a proton would be balanced by the electric field (proton mass =
1.67×10−27kg
, electronic charge
e=1.6×10−19C
, plate separation is 0.5cm. Take
g=9.8m/s2)
a) 1.4×10−6V
b) 2.0×10−6V
c) 1.7×10−6V
d) 3.2×10−6V
2) Select the correct option from the following
a) electric field is a scalar quantity
b) electromotive force is a vector quantity
c) electric current is a scalar quantity
d) eletric potential is a vector quantity
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