Question
Which of the following is the poor conductor of
electricity?Solution
Conductors: ​Atoms of conducting materials have free electrons in them. ​When a charged body is brought in contact with a conductor, the charges are transferred to the conductor until the force of repulsion between electrons in areas of excess electrons is decreased to a minimum value. Good conductors are materials that allow charges to flow through them. ·        Carbon is non-metal and there are no free electrons to conduct. Hence, it is a poor conductor of electricity.
230 192 172 ? 122 100
...What value should come in the place of (?) in the following number series?
64, 80, 104, ?, 176, 224
97, 106, ?, 195, 411, 460
What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
Find the missing term:
2, 6, 15, 31, 56, ?
32   48   96   ?   720   2520
82, 98, 130, 178, 242, ?
4 10 ? 62.5 156.25 390.625
...140, 146, 170, 224, ?, 470
7 47 ? 223 359 527
...