General Science - Online Test
Q1. A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is and points radially inward, what is the net charge on the sphere?
Answer : Option D
Explaination / Solution:
Since the electric field is inwards so charge is negative.
Since the electric field is inwards so charge is negative.
Q2. A piece of copper having a rectangular cross-section of 15.2 mm 19.1 mm is pulled in tension with 44,500 N force, producing only elastic deformation. Calculate the resulting strain? Take Young's modulus of copper as 11 Pa
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. Transfer of DNA into bacteria by phage is called as
Answer : Option C
Explaination / Solution:
Transfer of DNA into bacterial cell by phage or virus is called transformation. Phage kills the bacterium so called bacteriophage.
Q4.
Match the following :
Animal
a) Dugesia
b) Palaemon
c) Palamnaeus
d) Sea anemone
Excretory organ
i) body surface
ii) malpighian tubules
iii)protonephridia
iv) green glands
Answer : Option C
Explaination / Solution:
Excretory system of Dugesia is protonephridia, Palaemon is body surface, Palamnaeus is malpighian tubules and that of Sea anemone is body surface.
Q5. A sample of ideal gas is expanded to twice its original volume of 1.00 in a quasi-static process for which with . How much work is done by the expanding gas?
Answer : Option D
Explaination / Solution:
P=αV2α=5.00×1.01×105Vi=1.00m3Vf=2.00m3W=∫1.002.00P.dV=∫1.002.00αV2.dV=[αV33]2.001.00=1.18MJ
Q6. Select the correct statement from the following:
Answer : Option B
Explaination / Solution:
In organic evolution, fitness is the end result of the ability to adapt and gets selected by nature. Darwinian variations are small and directional. Mutation is sudden change in gene and all mammals have vertebrae.
Q7. The vapor pressure of different substances at the same temperature increases if
Answer : Option A
Explaination / Solution:
if the intermolecular forces of the substance are weak then vapour pressure increases.
Q8. An example of antibody is
Answer : Option B
Explaination / Solution:
Antibody gamma globulin
Q9. Examples of how groundwater can be contaminated?
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. Which of the following is the best example of an energy storage element in a solar energy system?
Answer : Option B
Explaination / Solution:
No Explaination.
