A particle falls towards earth from infinity. Its velocity on reaching the earth would be
Options
(a) infinity (b) √(2gR) (c) 2 √(Rg) (d) zero
Correct Answer:
√(2gR)
Explanation:
No explanation available. Be […]
An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change from its peak value to zero is
Options
(a) 50 sec (b) 0.02 sec (c) 5 […]
A 10 micro farad capacitor is charged to 500 V and then its plates are joined together through a resistance of 10 ohm. The heat produced in the resistance is
Options
(a) 500 […]
A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The coefficient of static friction between wall and body is 0.3. Then the frictional force […]
What is the general outer electronic configuration of the coinage metals?
Options
(a) ns², np⁶ (b) (n-1)d¹⁰, ns¹ (c) (n-1)d¹⁰, ns² (d) (n-1)d⁹, ns²
Correct Answer:
(n-1)d¹⁰, ns¹
Explanation:
No explanation available. Be […]
Heating food to 100° C will prevent all but following diseases
Options
(a) Salmonella infection (b) cholera (c) botulism (d) hepatitis B
Correct Answer:
hepatitis B
Explanation:
No explanation available. Be the first […]
Most abundant water insoluble polysaccharide of plant cell wall is
Options
(a) cellulose (b) hemicellulose (c) pectin (d) lignin
Correct Answer:
cellulose
Explanation:
No explanation available. Be the first to write the explanation […]
Ribosomes are involved in protein synthesis in
Options
(a) prokaryotes (b) eukaryotes (c) both prokaryotes and eukaryotes (d) viruses
Correct Answer:
both prokaryotes and eukaryotes
Explanation:
No explanation available. Be the first to […]
Which one of the following is a serial mode of reproduction in protozoa?
Options
(a) plasmotomy (b) schizogony (c) anisogamy (d) autogamy
Correct Answer:
schizogony
Explanation:
No explanation available. Be the first to […]
A threatened species category included
Options
(a) only endangered species (b) only vulnerable species (c) endangered and rare species (d) endangered, vulnerable and rare species
Correct Answer:
endangered, vulnerable and rare species
Explanation: […]
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