- Aan inductor and a capacitor
- Ban inductor but no capacitor
- Ca capacitor but no inductor
- Dneither an inductor nor a capacitor
Explanation:
Answer: A an inductor and a capacitor, B neither an inductor nor a capacitor
Reactance in electrical and electronic systems is the opposition of a circuit element to a change of electric current or voltage.Ideally a resistor has zero reactance.
Therefore in a circuit, reactance can be zero either if there are no inductors and capacitors in the circuit, or the individual reactance of inductors and capacitors cancel each other, making net reactance zero.
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In Young's experiment, light of wavelength 4000 Å is used to produce bright fringes of width 0.6 mm, at a distance of 2 meters. If the whole apparatus is dipped in a liquid of refractive index 1.5, then fringe width will be
|
(a) 0.2 mm |
(b) 0.3 mm |
(c) 0.4 mm |
(d) 1.2 mm |
A wire of diameter 0.02 metre contains 1028 free electrons per cubic metre. For an electrical current of 100 A, the drift velocity of the free electrons in the wire is nearly
|
(a) 1 × 10–19 m/s |
(b) 5 × 10–10 m/s |
(c) 2 × 10–4 m/s |
(d) 8 ×103 m/s |
Figure shows the cross-sectional view of the hollow cylindrical conductor with inner radius 'R' and outer radius '2R', cylinder carrying uniformly distributed current along it's axis. The magnetic induction at point 'P' at a distance
from the axis of the cylinder will be

|
(a) Zero |
(b) |
(c) |
(d) |
When a proton is accelerated with 1 volt potential difference, then its kinetic energy is
|
(a) |
(b) 1840 eV |
(c) 1 eV |
(d) 1840 c2 eV |
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:
In the arrangement of resistances shown below, the effective resistance between points A and B is
|
(a) 20 Ω |
(b) 30 Ω |
(c) 90 Ω |
(d) 110 Ω |
A beam of monochromatic blue light of wavelength 4200Å in air travels in water (μ = 4/3). Its wavelength in water will be
|
(a) 2800 Å |
(b) 5600 Å |
(c) 3150 Å |
(d) 4000 Å |