an insulating rod of length l
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an insulating rod of length l
an insulating rod of length l carries
an insulating thin rod of length l
a horizontal insulating rod of length
a thin rod of length l
a rod of length l
a thin uniform rod of length l
a metal rod of length l
a straight rod of length l
a uniform rod of length l
a weightless rod of length l
a thin smooth rod of length l
a semi infinite insulating rod
a light rod of length l
one end of a thermally insulated rod
a thin conducting rod of length l
a metallic rod of length l
a cylindrical metal rod of length l0
a thin uniform rod of length 4l
composite long rod insulator
porcelain long rod insulator
an insulating rod of length l, an insulating rod of length l carries, an insulating thin rod of length l, a horizontal insulating rod of length, a thin rod of length l, a rod of length l, a thin uniform rod of length l, a metal rod of length l, a straight rod of length l, a uniform rod of length l, a weightless rod of length l, a thin smooth rod of length l, a semi infinite insulating rod, a light rod of length l, one end of a thermally insulated rod, a thin conducting rod of length l, a metallic rod of length l, a cylindrical metal rod of length l0, a thin uniform rod of length 4l, composite long rod insulator, porcelain long rod insulator
