Archives

Let I = current through a conductor, R its resistance and V = potential difference across its ends. According to Ohm’s law, product of two of these quantities equals the third. Obtain Ohm’s law from dimensional analysis. Dimensional formulae for R and V are ML^2I^-2T^-3 and ML^2T^-3I^-1 respectively.

Given Dimensional formula of R = [ML2T-3I-2] Dimensional formula of V = [ML2T-3I-1] Dimensional formula of I = [I] Hence, [ML2T-3I-1] =... View Article

Can you explain Maslows theory of Motivation

Maslow’s Hierarchy of Needs Theory is regarded as one of the most popular theories on motivation. It is a theory of psychology that... View Article

Who captured Constantinople? (A) Ottoman Turks (B) French (C) British (D) Dutch

Ottoman Turks In 1453 the city of Constantinople was conquered by Ottoman Turks. Therefore, the correct option is (A)... View Article

Ottawa: Canada :: Canberra:? (A) Argentina (B) Switzerland (C) Sri Lanka (D) Australia

Australia Ottawa is the capital city of Canada and Canberra is the capital city of Australia Hence, the correct option is (D)... View Article

Select the word that can be substituted for the given phrase The state of being unmarried (A) alimony (B) bigamy (C) matrimony (D) celibacy

Celibacy The state of abstaining from marriage or sexual relations is known as celibacy. Hence, one word for a given phrase 'the state of being... View Article

Ornithology is study of (A) Birds (B) Reptiles (C) Fishes (D) Fossils

Birds Ornithology is the branch of zoology that deals with the systematic study of birds, including their spindle-shaped body, well-developed... View Article

A depolarizer used in dry cell is (A) ammonium chloride (B) manganese dioxide (C) potassium oxide (D) sodium phosphate

Manganese dioxide Manganese dioxide is used in the dry cell as a depolarizer Therefore, the correct option is (B)... View Article

The highest rank in Indian army is (A) General (B) Field Marshal (C) Lieutenant General (D) Colonel

Field Marshal The Field Marshal rank is the highest rank in the Indian Army. Therefore, the correct option is (B)... View Article

The members of the lok sabha are elected by the (A) People (B) Members of Rajya Sabha (C) Members of Parliament (D) President

People Members of the Lok Sabha are directly elected by the people of India, on the basis of universal suffrage. Hence, the correct option is (A)... View Article

Widal test is done to confirm (A) Malaria (B) Typhoid (C) Pneumonia (D) Jaundice

Typhoid The Widal test is a serological test that is performed for typhoid fever diagnosis. In this test bacteria causing typhoid fever is... View Article

The meniscus of mercury in the capillary tube is (A) Convex (B) Concave (C) Plane (D) Uncertain

The meniscus of mercury in the capillary tube is convex. Hence, the correct option is (A)... View Article

Thermoregulatory centre of the human body is (A) Pituitary (B) Skin (C) Hypothalamus (D) Thyroid

Hypothalamus Hypothalamus maintains the constant body temperature by regulation of the diameter of blood vessels, and sweating mechanisms.... View Article

Which of the following is a basic amino acid? (A) Lysine (B) Proline (C) Alanine (D) Aspartic acid

Lysine There are two functional groups present in all amino acids. One is carboxylic and the second is an amine group. The carboxylic acid donate... View Article

Underline the subject in the following sentence: Ninety five percent of an individual’s life is determined by his birth and death (A) Ninety-five percent (B) Ninety-five percent of an individual’s life (C) his birth and death (D) is determined by his birth and death

Ninety-five percent of an individual's life In the given sentence option (B) is the subject of the sentence. Option (A) is only part of what is... View Article

There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Rs 12000 after 3 years at the same rate?

Given 60% increase in amount in 6 years at Simple Interest We need to find CI of Rs 12000 after 3 years at same rate We know that, SI = (P x R x... View Article

Maximum solar energy is trapped by (A) planting trees (B) cultivating crops (C) growing algae in tanks (D) growing grasses

Maximum solar energy is trapped by growing algae in tanks. Hence, the correct option is (C)... View Article

The ratio of active masses of 22g of CO2, 3g of H2 and 7g of N2 in a gaseous mixture: (A) 22:3:7 (B) 0.5: 3: 7 (C) 1:3:1 (D) 1:3: 0.5

Let V be the volume of gaseous mixture CO2 = 22/44 = 0.5 moles H2 = 3/2 = 1.5 moles N2 = 7/28 = 0.25 moles Total moles = 0.5 + 1.5 + 0.25 We get,... View Article

Three moles of an ideal gas kept at a constant temperature at 300 k are compressed from a volume of 4L to 1L. The work done in the process is (A) – 10368J (B) -110368J (C) 12000J (D) 120368J

Here n = 3 T = 300K V1 = 4 litre V2 = 1 litre W = ? In an isothermal process, work done is given by We get, = -10368J Therefore, the correct... View Article

Give reason: Histones are positively charged

Histones contain high amount of amino acids such as lysines and arginines. Both the basic amino acids carry positive charge on their side chains.... View Article

How many valence electrons does al have?

In the third row of the periodic table, the third element is aluminium. The outermost orbitals to be filled are 3s and 3p. The 3s orbital fills... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30