GATE Questions

Q:

If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to _____ ?

A) 300 m B) 30 m
C) 3 m D) 0.3 m
 
Answer & Explanation Answer: A) 300 m

Explanation:

h =  straight c over straight v = 3 × 108/106 = 300 m

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Q:

Which Noble Gas has the highest First Ionization Energy?

A) Neon B) Helium
C) Argon D) Xenon
 
Answer & Explanation Answer: B) Helium

Explanation:

Helium has the highest First Ionization Energy in the Noble Gases group.

Ionization Energy ::

Ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms. Atoms are more stable when they have full valence shells.

Noble Gases have a very stable electron configuration, therefore, they have the highest amount of ionization energy within their periods. It decreases down a family because electrons farther from the nucleus are easier to remove.

Ionization Energy levels of Noble Gases group in Descending Order :: He, Ne, Ar, Kr, Xe, Rn

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Q:

In what time will Rs. 1860 amount to Rs. 2641.20 at simple interest 12% per annum?

A) 2.9 years B) 3.5 years
C) 4.2 years D) 4.7 years
 
Answer & Explanation Answer: B) 3.5 years

Explanation:

Given that Rs. 1860 will become Rs. 2641.20 at 12%

 

=> Simple Interest = 2641.20 - 1860 = Rs. 781.20

 

We know I = PTR/100

 

=> 781.20 x 100 = 1860 x T x 12

 

=> T = 78120/1860x12

 

=> T = 78120/22320

 

=> T = 3.5 years.

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Q:

Two numbers are in the ratio 3 : 7. If 6 be added to each of them, then they are in the ratio 5 : 9. Find the numbers ?

A) 11 & 17 B) 7 & 17
C) 9 & 21 D) 13 & 23
 
Answer & Explanation Answer: C) 9 & 21

Explanation:

Let the two numbers be x and y

Given x : y = 3 : 7 .....(1)

Now, x+6 : y+6 = 5 : 9 .....(2)

From (1), x = 3y/7

From (2), 5y - 9x = 24

=> 5y - 9(3y/7) = 24

=> y = 21

=> From(1), x = 9

Hence, the two numbers be 9 and 21

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Filed Under: Ratios and Proportions
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36 12224
Q:

Five plays K, L, M, N and O are to be staged from Monday to Friday of a week. On each day, only one play will be staged. N or O should not be either the first or last to be staged. O should be immediately followed by M. L should be staged immediately after N. One play is staged between K and L.

Which is the second play to be staged ?

A) L B) O
C) M D) N
 
Answer & Explanation Answer: D) N

Explanation:

O should be immediately followed by M ie, the order OM should be followed. N should be immediately followed by L ie, the order NL should be followed. One play is staged between k and L and N or O should not be the first or last play. So, the order is

Monday             K

Tuesday            N

Wednesday        L

Thursday           O

Friday               M

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Filed Under: Logical Sequence of Words
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35 12201
Q:

Moving from one website to another is called

A) Browsing B) Attaching
C) Downloading D) Uploading
 
Answer & Explanation Answer: A) Browsing

Explanation:

Moving from one website to another is called Browsing.

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Q:

Tadpole is to frog as larva is to

A) insect B) spider
C) worm D) None of the above
 
Answer & Explanation Answer: A) insect

Explanation:

Tadpole is the larval stage in all the amphibians whereas larva in all the insects.

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Q:

Light from the sun reaches us in nearly

A) 5 min B) 4.30 hrs
C) 8 min D) 5.30 hrs
 
Answer & Explanation Answer: C) 8 min

Explanation:

The light from the sun takes about 8 minutes to reach the Earth after it has been emitted from the sun's surface.

 

The time it takes for light to reach planets in our Solar System varies from about 3 minutes for Mercury to about 5.3 hours for Pluto.

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