The cellular transport method which involves use of transmembrane proteins without energy expenditure is called
Options
(a) diffusion (b) facilitated diffusion (c) active transport (d) exocytosis
Correct Answer:
facilitated diffusion
Explanation:
No explanation […]
There is a ring of radius r having linear charge density λ and rotating with a uniform angular velocity ω. The magnetic field produced by this ring at its own centre would be
Options […]
A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰, a ray is reflected and refracted at the farther surface of the sphere. The angle between the reflected […]
The relationship between decay constant λ and half-life T of a radioactive substance is
Options
(a) λ=log₁₀2/T (b) λ=logₑ2/T (c) λ=log₂10/T (d) λ=log₂e/T
Correct Answer:
λ=logₑ2/T
Explanation:
No explanation available. Be the first […]
The kinetic energy of α-particle emitted in the α-dacay of ₈₈Ra²²⁶ is [given, mass number of Ra=222 u]
Options
(a) 5.201 MeV (b) 3.301 MeV (c) 6.023 MeV (d) 4.871 MeV
Correct Answer: […]
If the electric field lines is flowing along axis of a cylinder, then the flux of this field through the cylindrical surface with the axis parallel to the field is [where r=radius of cylinder]
The current gain of a transistor in common base configuration is 0.96. Corresponding to the change in emiiter current 10 mA, the change in base current would be
Options
(a) 0.03 mA (b) […]
The p-type semiconductor is
Options
(a) positively charged (b) negatively charged (c) electrically charged (d) unchanged at 0 K or -273 ⁰ C but charged at temperature higher than 0 K.
Correct Answer: […]
A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series with a resistance and a cell of emf 2V having negligible internal reistance. A source of emf 10 mV […]
An inductor coil is connected to a 12 V battery and drawing a current 24 A. This coil is connected to capacitor and an AC source of rms voltage rating 24 V in the series […]
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