Electric field at a point of distance r from a uniformly charged wire of infinite length having linear charge density λ is directly proportional to
Options
(a) r⁻¹ (b) r (c) r² (d) […]
The minimum number of NAND gates used to construct an OR gate is
Options
(a) 4 (b) 6 (c) 5 (d) 3
Correct Answer:
3
Explanation:
No explanation available. Be the first to […]
Identify the wrong statement with reference to solar cell
Options
(a) it is a p-n junction diode with no external bias (b) It uses materials of high optical absorption (c) It uses materials […]
If the wavelength of incident light falling on a photosensitive material decreases, then
Options
(a) photoelectric current increases (b) stopping potential decreases (c) stopping potential remains constant (d) stopping potential increases
Correct Answer: […]
A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then, the resistance of the circular wire between any two diametrically points is
Options
(a) 6Ω (b) 3Ω (c) 9/4Ω […]
The temperature coefficient of resistance of an alloy used for making resistor is
Options
(a) small and positive (b) small and negative (c) large and positive (d) large and negative
Correct Answer:
small […]
The dimensions of mobility of charge carriers are
Options
(a) [M⁻²T²A] (b) [M⁻¹T²A] (c) [M⁻²T³A] (d) [M⁻¹T³A]
Correct Answer:
[M⁻¹T²A]
Explanation:
Mobility = drift velocity / electric field μ = v(d) / E = […]
The control rods used in a nuclear reactor can be made up of
Options
(a) graphite (b) cadmium (c) uranium (d) barium
Correct Answer:
cadmium
Explanation:
No explanation available. Be the first to […]
Transformer is used to
Options
(a) convert AC to DC voltage (b) convert DC to AC voltage (c) obtain desired DC power (d) obtain desired AC voltage and current
Correct Answer:
obtain desired […]
A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession. The atomic number and mass number of the final nucleus will be
Options
(a) 90233 (b) 90238 (c) 91238 […]
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