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Q:

three_resistors_are_arranged_in_a_circuit_as_shown_above1559105724.PNG image

Three resistors are arranged in a circuit as shown above. The battery has an unknown but constant emf ε and a negligible internal resistance.

Now, determine the equivalent resistance of the three resistors.

A) 12 Ω	B) 10 Ω
C) 16 Ω	D) 15 Ω

Answer & Explanation Answer: A) 12 Ω

Explanation:

From the given circuit,

three_resistors_are_arranged_in_a_circuit_as_shown_above1559105964.PNG image

The resistors R1 and R2 are in parallel connection and R3 is in series with R1 & R2

The equivalent resistance of R1 and R2 is

Req = (12 × 4)/(12 + 4) = 3 Ω.

Adding R3 in series with the pair gives

R = Req + 9

R = 3 + 9

R = 12 Ω.

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Filed Under: Physics
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Q:

A data warehouse is composed of

A) current data	B) internal and external data sources
C) historical data from legacy systems	D) historical & current data

Answer & Explanation Answer: C) historical data from legacy systems

Explanation:

A data warehouse is a relational database that is designed for query and analysis rather than transaction processing. It usually contains historical data that is derived from transaction data, but it can include data from other sources. Data warehouses are designed to help you analyze your data.

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Filed Under: Oracle
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Q:

The Jazz age occurred during which decade

A) 1910 - 1920	B) 1920 - 1930
C) 1930 - 1940	D) 1900 - 1910

Answer & Explanation Answer: B) 1920 - 1930

Explanation:

Jazz is a music genre that originated in the African-American communities in the early 20th century. The Jazz age occurred during 1920 - 1930 i.e, started post-World War 1 movement and ended with the Great Depression in 1929. It was the age in which jazz music and dance emerged.

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Filed Under: World History
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Q:

The powder keg in the balkans refers to the

A) efforts taken to ease tensions throughout the region	B) invasion of the region
C) larger number of munitions factories built in the region	D) political instability of the region

Answer & Explanation Answer: D) political instability of the region

Explanation:

In the early 20th century, the Balkans were called a "powder keg" because the political situation in the region was very unstable. For a long time, the Ottoman Turks occupied the balkans, and with the rise of nationalism, some balkan states declared independence.

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Filed Under: World History
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Q:

The vitamin D deficiency disease in adults is known as

A) Hypovitaminosis D	B) Avitaminosis
C) Scorbutus	D) Petechiae

Answer & Explanation Answer: A) Hypovitaminosis D

Explanation:

Vitamin D also known as Sunshine vitamin is produced in the body when our skin is exposed to sunlight. Its deficiency leads to a disease in which bone tissue doesn't properly mineralize leading to soft bones. The vitamin D deficiency disease in adults is known as Hypovitaminosis D.

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Filed Under: Biology
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Q:

Which energy source generates the least greenhouse gases?

A) Fossil fuels energy	B) Nuclear energy
C) Solar energy	D) All of the above

Answer & Explanation Answer: A) Fossil fuels energy

Explanation:

Fossil fuels energy source generates the least greenhouse gases. Of them, i.e, oil, natural gas and coal, natural gas source generates the least greenhouse gases.

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Filed Under: General Science
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Q:

The force that generates wind is

A) Gravity force	B) Pressure gradient force
C) Coriolis force	D) Centrifugal force

Answer & Explanation Answer: B) Pressure gradient force

Explanation:

Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. The force that generates wind is called as Pressure gradient force.

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Filed Under: Physics
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Q:

Fitness can be achieved only through

A) endurance	B) frequency
C) accuracy	D) resistance

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