General Science - Online Test
Q1. The value of the gravitational constant G is
Answer : Option D
Explaination / Solution:
The value of G was experimentally determined by Lord Henry Cavendish using a torsion balance.Cavendish brought two large lead spheres near the smaller spheres attached to the rod. Since all masses attract, the large spheres exerted a gravitational force upon the smaller spheres and twisted the rod a measurable amount. Once the torsional force balanced the gravitational force, the rod and spheres came to rest and Cavendish was able to determine the gravitational force of attraction between the masses.Cavendish expressed his result in terms of the density of the Earth.
After converting to SI units, Cavendish's value for the Earth's density, 5.448 g cm−3, gives
- G = 6.74×10−11 m3 kg–1 s−2
Today, the currently accepted value is 6.67259 x 10-11 N m2/kg2.
Q2. Conductivity always decreases with decrease in concentration both, for weak and strong electrolytes because of the fact that
Answer : Option C
Explaination / Solution:
Conductivity of solution decreases with dilution because number of ions per unit volume decreases.
Q3. in p-type semiconductor
Answer : Option B
Explaination / Solution:
P-type semiconductors have a larger hole concentration than electron concentration. The term P-type refers to the positive charge of the hole.
In P-type semiconductors, holes are the majority carriers and electrons are the minority carriers. P-type semiconductors are created by doping an intrinsic semiconductor with acceptor impurities (or doping an n-type semiconductor).
A common P-type dopant for silicon is boron. For P-type semiconductors the Fermi level is below the intrinsic Fermi level and lies closer to the valence band than the conduction band.
Q4. Which of the following is the condition for equilibrium of a firm?
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. The aquatic organisms that can actively swim at will against the water current is
Answer : Option D
Explaination / Solution:
Necton is an aquatic organism that can actively swim at will against the water current. Benthos and planktons float with water current and not against the water current.
Q6. Open market operations is
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. The inner most wall layer of microsporangium is called as
Answer : Option D
Explaination / Solution:
Microsporangium is covered by a number of layers. The outer layer or integuments surround the tepetum. The tepetum provide nutrients to growing microspores that leads to pollen grains.
Q8. ________is the index showing changes in the Indian stock market
Answer : Option B
Explaination / Solution:
Initially compiled in 1986, the Sensex is the oldest stock index in India. Sensex is the index showing changes in the Indian stock market
Q9. Which pair is similar
Answer : Option C
Explaination / Solution:
Graafian follicle changes into corpus leteum as egg is released from it during ovulation. Corpus leteum release hormone called androgen.
Q10. Human capital is investment that brings
Answer : Option B
Explaination / Solution:
Quality of the labour force is more important than the quantity. Educated and healthy labour force can contribute better to the development of the nation.
