GATE Questions

Q:

Electrical Pressure is also called

A) Current B) Voltage
C) Resistance D) Power
 
Answer & Explanation Answer: B) Voltage

Explanation:

Electrical Pressure is also called as Voltage. Voltage is measured in Volts.

 

Volt : A unit of electrical pressure or Voltage is called Volt.

 

One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.

 

Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.

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9 3960
Q:

There are four consecutive even integers. Sum of the reciprocals of the first two number is (11/60). Find the reciprocal of third largest number of the series.

A) 1/12 B) 2/14
C) 1/14 D) 2/13
 
Answer & Explanation Answer: C) 1/14

Explanation:

Ans. C.
Let 4 consecutive even numbers are x, x+ 2, x+ 4, x+ 6
According to the question -
1/x + 1/x+2 = 11/60
x+2+x/ x(x+2) = 11/60
2(x+1)/x^2 + 2x = 11/60
120x + 120 = 11x 2 + 22x
11x 2 - 98x – 120 = 0
So ,
X = -24/22 , 10
X = -12/11 , 10
So, the numbers will be 10,12,14,16.
Hence,
Third largest number = 14
Reciprocal of third number = 1/14

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2 3957
Q:

What is Latus Rectum of Parabola?

A) line segment B) vertex
C) focus D) major axis
 
Answer & Explanation Answer: A) line segment

Explanation:

As parabola is a locus of a point, which moves so that its distance from focus and directrix is always equal.

 

The latus rectum of a conic section is the chord (line segment) that passes through the focus, is perpendicular to the major axis and has both endpoints on the curve. The length of the latus rectum is determined differently for each conic.

                                      download1522126663.jpg image

 

The length of a parabola's latus rectum is 4p, where p is the distance from the focus to the vertex.

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14 3949
Q:

Which alphabet is a tools?

A) X B) S
C) A D) Y
 
Answer & Explanation Answer: A) X

Explanation:

The letter 'X' resembles the same as the tool AXE in sounding.

 

Hence, the alphabet X is a tool.

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6 3943
Q:

Slip rings are usually made of

A) Aluminium B) Copper
C) Phosphor Bronze D) Carbon
 
Answer & Explanation Answer: C) Phosphor Bronze

Explanation:

A Slip ring is a ring in a dynamo or electric motor which is attached to and rotates with the shaft, passing an electric current to a circuit via a fixed brush pressing against it.

 

Slip rings are usually made of Phosphor Bronze.

 

Slip ring motors usually have a 'phase-wound' rotor. This type of rotor has a 3-phase, double-layer, distributed winding consisting of coils used in alternators. The rotor core is made up of steel laminations which have slots to accommodate formed 3-single phase windings.

slip_rings_are_usually_made_of1535005379.png image

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3 3941
Q:

36 of what number is 18?

A) 38 B) 42
C) 50 D) 62
 
Answer & Explanation Answer: C) 50

Explanation:

Let the required number be 'p'

36 of what number is 18 implies 36% of p = 18

=> 36 x p/100 = 18

=> p = 1800/36

=> p = 50.

 

Hence, 36% of 50 is 18.

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Filed Under: Percentage
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9 3934
Q:

Walking at a speed of 10 km/hr, Madhu reaches her university 15 minutes late. Next time she increases her speed by 2 km/hr, but she is still late by 5 minutes. The distance of the university from her house is:

A) 15 km B) 30 km
C) 20 km D) 10 km
 
Answer & Explanation Answer: D) 10 km

Explanation:
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12 3934
Q:

Which country has been unanimously elected as the President of the UN-Habitat  ?

A) Russia B) India
C) China D) Japan
 
Answer & Explanation Answer: B) India

Explanation:

India has been unanimously elected as the President of the UN-Habitat. UN-Habitat, an organ of the United Nations’ Organisation (UNO) reports to the United Nations General Assembly. UN-Habitat  promotes socially and environmentally sustainable human settlements across the world. India has been elected as the President of UN-Habitat after a gap of 10 years. This is only the third time that India has been elected as the President of UN-Habitat after 2007 and 1988. The UN-Habitat was established in 1978.

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Filed Under: World Organisations
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