Questions

Q:

Who wrote the first history book?

A) Herodotus B) Euclid
C) Julius Caesar D) Aristotle
 
Answer & Explanation Answer: A) Herodotus

Explanation:

Herodotus, a Greek author written the first history book in 5th century B.C.

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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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Q:

I am an odd number. Take away a letter and I become even. What number am I?

Answer

The required number is SEVEN.


If you remove  S, it becomes EVEN.

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Q:

A wire of copper having length I and area of cross-section A is taken and a current / is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

A) P B) < P
C) > P D) 2P
 
Answer & Explanation Answer: C) > P

Explanation:

Aluminum has a resistivity varying from 2.65 to 2.82 × 10−8 Ω m.The resistivity of copper is generally given as: 1.72 x 10-8 Ω.m.So, since resistivity of aluminium is higher than that of copper, so Power dissipated will be greater than P. this is because rest of the factors (l, A and i) are constant.

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Q:

What does deficit spending require a government to do?

A) cut taxes B) hire more workers
C) lay off workers D) take on debt
 
Answer & Explanation Answer: D) take on debt

Explanation:

Deficit spending means spending more than the income getting. A government need to take debts for deficit spending.

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Q:

Which can disrupt the cell cycle?

A) Mutation B) Replication
C) Both A & B D) None of the above
 
Answer & Explanation Answer: D) None of the above

Explanation:

Mutations can disrupt the cell cycle, and can cause certain diseases and conditions.

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Q:

Rana Pratap Sagar Dam is built on which of the following rivers?

A) Ghagra B) Yamuna
C) Kosi D) Chambal
 
Answer & Explanation Answer: D) Chambal

Explanation:

Rana Pratap Sagar Dam is built on Chambal river in Rajasthan.

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Q:

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one, which best expresses the same sentence in Passive/Active voice.

 

Who taught you to drive a truck?

 

A) To drive a truck by whom were you taught? B) Driving a truck by whom were you taught?
C) Driving a truck by who were you being taught? D) By whom were you taught to drive a truck?
 
Answer & Explanation Answer: D) By whom were you taught to drive a truck?

Explanation:
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