railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Electrostatics

क्षेत्र D = ar C/m 2 के साथ आयतन आवेश घनत्व कितना होगा ?

1
1 C/m3
2
0 C/m3
3
\(\frac{2}{r}\) C/m3
4
r C/m3
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