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A cube of side b has a charge q at each of its vertices. Determine the potential and electric field due to this charge array at the centre of the cube.

Given., length of side of cube = b and charge at each side of its vertices = q As we... View Article

Anomalous pair in Mendeleev’s periodic table is: (A) Li, Na (B) Co, Ni (C) Mg, Al (D) Be, B

Answer: (B) Co, Ni Anomalous pair in Mendeleev’s periodic table is Cobalt and Nickle.

1 kilometer is equal to how many meter?

1 kilometer is equal to 1000 meters. 1km = 1000 m

Several tissues combine to form: (A)Organ (B) Cell (C) Cytoplasm (D) Organism

Answer: (A)Organ The organisation of a group of similar cells along with intercellular substances to perform a specific function are... View Article

MYSQL full form?

The full form of MySQL is My Structured Query Language

What does UPS stand for?

UPS stands for United Parcel Service.

The iupac name of the ccl4 is:

The iupac name of the CCl4 is Tetrachloromethane

A proton and an alpha – particle are accelerated through same potential difference. Then, the ratio of de-Broglie wavelength of proton and alpha-particle is: (A)√2 (B)1/√2 (C)2√2 (D) None of these

Answer: (C)2√2 Explanation: Given, A proton and an alpha – particle are accelerated through same potential difference. As we... View Article

Expand CFC? What are their uses?

CFC is the abbreviation for Chlorofluorocarbons gases. It contains carbon, chlorine, and fluorine. CFC is famous for low toxicity, reactivity and flammability. It... View Article

Give reasons why plastic containers are used as storage devices?

Plastic containers are used as storage devices because they does not react with food or subtances stored in it. Plastics... View Article

Major areas of rice and wheat.

Major areas of rice and wheat: Rice is majorly grown in Haryana and Punjab Wheat is majorly grown in Northern... View Article

Ganongs respirometer is used for:

Ganongs respirometer is used to measure the rate of respiration of living organism. It measures the rate of exchange of... View Article

Two coils of self inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coil is: (A) 10mH (B) 16mH (C) 4mH (D) 6mH

Answer: (C) 4mH Given, L1=2mHL2=8mH By the formula, we know, the mutual inductance between coil is: \(\begin{array}{l}M = k\sqrt{L_{1}L_{2}}\\ M =... View Article

An observer 1.5 metres tall is 20.5 metres away from a tower 22 metres high. Determine the angle of elevation of the top of the tower from the eye of the observer.

As per the given condition and figure drawn, tan A = OB/BC [Tan A = Opposite side to... View Article

What is presbyopia? State its causes and how is its corrected?

Presbyopia is a state of defect of vision when an individual is not able to see clearly nearby and far... View Article

The unit vector along i + j is: (A) k (B) i + j (C) (i + j)/√2 (D) (i + j)/2

Answer: (C) (i + j)/√2 Given, vector = i + j Magnitude of vector = |i + j| Unit vector along(i+j)... View Article

How does pruning help in making the hedge dense? A.It induces the differentiation of new shoots from the rootstock. B.It frees axillary buds from apical dominance. C. The apical shoot grows faster after purning. D.It releases wound hormones

Answer: B.It frees axillary buds from apical dominance.

Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matte obtained from the blast furnace is charged into a silica-lined converter. Some silica is also added, and a hot air blast is blown into the mixture to obtain blister copper, which is purified by electrorefining. The chemical composition of the slag formed during smelting is: (i)CuSiO3 (ii) CaSiO3 (iii) FeSiO3 (iv) None of these

Answer: (iii) FeSiO3 Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke... View Article

Which of the following is not defined? (A) Sin 90° (B) Cos 90° (C) Tan 90° (D) Sin 0°

Answer: (C) Tan 90° Tan 90° = Sin 90°/Cos 90° = 1/0 = Undefined

Jallianwala bagh incident took place on:

Jallianwala bagh incident took place on April 13, 1919.

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