Common Admission Test (CAT) Questions and Answers with Explanation

Q:

What device converts light energy to electrical energy?

A) Photodiode	B) Photovoltaic cell
C) Thermocouple	D) Heliostats

Answer & Explanation Answer: B) Photovoltaic cell

Explanation:

what_device_converts_light_energy_to_electrical_energy1555397376.png image

A device which is used to convert light energy directly into electrical energy is called as photovoltaic cell or a solar cell.

Heliostats convert light energy into heat energy.

A thermocouple is a device for measuring temperature.

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Filed Under: Physics
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2 4919

Q:

The number of solutions of the equation $l o g_{\frac{x}{2}} (x^{2}) + 40 l o g_{4 x} (\sqrt{x}) - 14 l o g_{16 x} (x^{3}) = 0$ is:

A) 0	B) 1
C) 2	D) 3

Answer & Explanation Answer: D) 3

Explanation:

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Filed Under: Logarithms
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14 4914

Q:

Fiscal Policy is concerned with

A) Government Spending and Taxation	B) Money Supply
C) Government Spending, Money Supply and Taxation	D) Taxation

Answer & Explanation Answer: A) Government Spending and Taxation

Explanation:

The two most widely recognized tools used to influence a Nation's Economic activity are Monetary policy and Fiscal policy.

Monetary policy is primarily concerned with the management of interest rates and the total supply of money in circulation and is generally carried out by central banks

Fiscal policy is the collective term for the taxing and spending actions of governments.

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Filed Under: Indian Economy
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13 4912

Q:

Which of the following best describes Accounting?

A) is an information system that provides reports to its stakeholders regarding economic activities and the condition of the business	B) is used only for filling out tax returns and for financial statements for various types of governmental reporting requirements
C) records economic data but does not communicate the data to users according to any specific rules	D) is of no use by individuals outside of the business

Answer & Explanation Answer: A) is an information system that provides reports to its stakeholders regarding economic activities and the condition of the business

Explanation:

Accounting is the systematic and comprehensive recording of financial transactions pertaining to a business.

Which_of_the_following_best_describes_Accounting1537425183.gif image

Accounting also refers to the process of summarizing, analyzing and reporting these transactions to oversight agencies, regulators and tax collection entities.

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Q:

CPU performance is measured through ________.

A) MHz	B) Throughput
C) Flaps	D) None of the above

Answer & Explanation Answer: B) Throughput

Explanation:

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Q:

What is the difference between the compound interests on Rs. 5000 for 11⁄2 years at 4% per annum compounded yearly and half-yearly?

A) Rs. 1.80	B) Rs. 2.04
C) Rs. 3.18	D) Rs. 4.15

Answer & Explanation Answer: B) Rs. 2.04

Explanation:

Compound Interest for 1 ¹⁄₂ years when interest is compounded yearly = Rs.(5304 - 5000)

Amount after 1¹⁄₂ years when interest is compounded half-yearly

Compound Interest for 1 ¹⁄₂ years when interest is compounded half-yearly = Rs.(5306.04 - 5000)

Difference in the compound interests = (5306.04 - 5000) - (5304 - 5000)= 5306.04 - 5304 = Rs. 2.04

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17 4909

Q:

The area of a square is equal to the area of a rectangle. The length of the rectangle is 5 cm more than a side of the square and its breadth is 3 cm less than the side of the square. What is the perimeter of the rectangle ?

A) 15 cm	B) 18 cm
C) 34 cm	D) 26 cm

Answer & Explanation Answer: C) 34 cm

Explanation:

Let the side of the square be 's' cm

length of rectangle = (s+5) cm

breadth of rectangle = (s-3)cm

(s+5) (s-3) =

$s^{2}$ - 5s - 3s - 15 = $s^{2}$

2s = 15

Perimeter of rectangle = 2(L+B) = 2(s+5 + s–3) = 2(2s + 2)

= 2(15 + 2) = 34 cm

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Filed Under: Area
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28 4909

Q:

Which of the following is the primary purpose of the DSM?

A) Understanding the causes of mental disorders	B) Placement of mental disorders in appropriate cultural context
C) Diagnosis of mental disorders	D) Selection of appropriate psychological therapies for mental disorders

Answer & Explanation Answer: C) Diagnosis of mental disorders

Explanation:

The DSM is the Diagnostic and Statistical Manual of Mental Disorders. Its primary pupose is to help the mental health professionals like psychiartists, psycologists, etc... to treat mental illnesses. The DSM is published by the APA, American Psychiatric Association.

The_primary_purpose_of_DSM_is_to1557139899.jpg image

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