Bissoy.com
Doctors Medicines MCQs Q&A

A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become

A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become Correct Answer One half

Related Questions

A cable of core radius 1.25cm and impregnated paper insulation of thickness 2.13cm and relative permittivity 3.5. Compute the capacitance of the cable/km(in nF)
Which of the following statements are true? a. In overhead lines, inductance is more predominant whereas capacitance is in the cable. b. In overhead lines, capacitance is more predominant whereas inductance is in the cable. c. Cost of cable is high compared to the overhead lines. d. Cost of cable is low compared to overhead lines
A diode is replaced with another diode of different material. The ratio of relative permittivity of new material to old is 0.5. The initial capacitance was 20pF, then final capacitance will be __________
What is the absolute permittivity of a dielectric medium where ϵ0 is the permittivity of free space and ϵ1 is the relative permittivity of the medium? 
S1: Instantly the full load yanked Gordy towards the side of the bridge.
P: But the pull of the cable was too much.
Q: He could hardly feel the cable, slipping through his fingers, ripping off his gloves, and streaking over the railing like an escaping snake.
R: It smashed his hands hard against the top of the railing, causing a split - second feeling of fierce pain followed by numbness.
S: He held on to the cable; it had been hard work lifting it, and he did not want to have to start over again.
S6: Feeling a sharp burning sensation where the cable was speeding between his things, Gordy rose on tiptoe and as he did, the slithering coil of cable tightened around his left foot and yanked him over the railing.

The Proper sequence should be:
A silicon PN junction diode under revers bias has depletion width of 10µm, relative permittivity is 11.7 and permittivity, ε0 =8.85×10-12F/m. Then depletion capacitance /m2 =?
Consider the following components in a multi-stage R-C coupled amplifier: 1. Parasitic capacitance of transistor 2. Coupling capacitance 3. Stray capacitance 4. Wiring capacitance Which of the above components effectively control high frequencies?
Two capacitors having capacitance value 4F, three capacitors having capacitance value 2F and 5 capacitors having capacitance value 1F are connected in parallel, calculate the equivalent capacitance.
A porous solid dielectric has a relative permittivity of 4. It is to be impregnated by a liquid dielectric whose relative permittivity should ideally be
Calculate the relative permittivity of the second dielectric if the relative permittivity of the first is 4. The electric field strength of the first dielectric is 8V/m and that of the second is 2V/m.