GATE Questions

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Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

20% of 120

20 x 120/100

= 4 x 6

= 24

Hence, 20% of 120 = 24.

Cognitive psychology is the branch of psychology that studies study internal processes that include perception, attention, language, memory, and thinking.

Cognitive psychology focuses on the way people process information.

Cricket World cup Year wise winners list from its starting year.

Year  -  Winner score

1975  -  West Indies 

1979  -  West Indies 

1983  -  India 

1987  -  Australia 

1992  -  Pakistan 

1996  -  Sri Lanka 

1999  -  Australia 

2003  -  Australia 

2007  -  Australia 

2011  -  India 

2015  -  Australia 

Australia won most number of titles i.e, 5 times Cricket World Cup title.

Ans.
Currently :
A+B+C+D = 76
According to ques , after 7 years
A+B+C+D = 7x+6x+5x+8x = 76+7*4
26x = 76 + 28
X = 104/26
x = 4
C’s present age = 5x – 7 =20 – 7
                                     = 13

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons. 

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance. 

From the given circuit,

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.

Oligopoly is market structure where a small number of large firms are there. Oligopolistic industries are characterized by a few dominant firms and substantial entry barriers.