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Akhil Kumar Singh's user avatar
Akhil Kumar Singh's user avatar
Akhil Kumar Singh's user avatar
Akhil Kumar Singh
  • Member for 2 years, 11 months
  • Last seen more than a month ago
  • Mau,UP,India
22 votes
7 answers
7k views

Why does water contract on melting whereas gold, lead, etc. expand on melting?

5 votes
3 answers
697 views

How come the number of wandering electrons is same as the number of the positive ions?

4 votes
1 answer
2k views

What exactly is the natural frequency of an object?

3 votes
3 answers
3k views

Why does a simple machine with Mechanical Advantage (MA) less than 1 acts as speed multiplier?

2 votes
2 answers
469 views

Why reversing the direction of electric current reverses the magnetic fields' direction?

2 votes
1 answer
3k views

Why heat flows from a hot body to cold body and not vice versa? [duplicate]

2 votes
1 answer
823 views

How does higher concentration leads to higher internal resistance in the cell?

1 vote
1 answer
2k views

Why increasing the resistance in a series circuit decreases the current in the circuit?

1 vote
2 answers
658 views

How does the work done in moving the coil or magnet get transformed into electrical energy in the form of current in the coil?

1 vote
1 answer
185 views

What is the reason that the vibrating body gradually acquires the frequency of the external periodic force in forced vibration?

1 vote
0 answers
146 views

Why does the melting point of water decreases with increase in pressure? [duplicate]

1 vote
2 answers
1k views

How silver with greater number of free electrons has lower resistance?

1 vote
1 answer
145 views

Why air particles in a longitudinal sound wave don't leave their mean position?

0 votes
1 answer
619 views

How does emf depends on material of electrode? [closed]

0 votes
1 answer
229 views

How does time period of vibration of a body depends on the shape and size of a body?

0 votes
0 answers
44 views

How can rotation be produced if moment of force of reaction is zero?

0 votes
2 answers
847 views

What is the difference between band gap and first ionisation energy?

0 votes
2 answers
3k views

Why the specific heat capacity of the same substance is different in its different phase (state of matter)?

0 votes
1 answer
32 views

How are the electrons able to overcome the significant force of attraction of the ions?