A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c= velocity of light)
Options
(a) E/c (b) 2E/c (c) 2E/c² (d) E/c²
Correct […]
A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected in series with the wire and an accumulator of emf 2V, so as to get a potential gradientof 1mV per cm […]
A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap […]
A certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photoelectric current for this light is 3V₀. If the same surface is illuminated with light of wavelength 2λ, the […]
The electric field in a certain region is acting radially outward and is given by E=Ar. A charge contained in a sphere of radius a centred at the origin of the field will be given […]
vascular bundles in monocotyledons are considered closed because
Options
(a) a bundle sheath surrounds eeach bundle (b) cambium is absent (c) there are no vessels with perforations (d) xylem is surrounded all around […]
Keel is the characteristic feature of flower of
Options
(a) tulip (b) indigofera (c) aloe (d) tomato
Correct Answer:
indigofera
Explanation:
No explanation available. Be the first to write the explanation for this […]
In which of the following gametophyte is not independent free living
Options
(a) Funaria (b) Marchantia (c) pteris (d) pinus
Correct Answer:
pinus
Explanation:
No explanation available. Be the first to write the […]
Which of the following characteristics is mainly responsible for diversification of insects on land
Options
(a) Bilateral symmetry (b)Exoskeleton (c) Eyes (d) Segmentation
Correct Answer:
Exoskeleton
Explanation:
The exoskeleton of insects consists of chitinous […]
Male gametes are flagellated in
Options
(a) polysiphonia (b) Anabaena (c) Ectocarpus (d) spirogyra
Correct Answer:
Ectocarpus
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
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