Kirchhoff's first law ie, at a junction is based on the law of conservation of
1
charge
2
energy
3
momentum
4
angular momemtum
Official Solution
Correct Option: (1)
Kirchhoff's first law is based on the law of conservation of charge.
02
PYQ 2015
medium
physicsID: upsee-20
For a given circuit, it is observed that the current is independent of the value of the resistance . Then, the resistance values must satisfy
1
2
3
4
Official Solution
Correct Option: (1)
As is independent of , no current flows through this requires that the junction of and is at the same potential as the junction of and . This must satisfy the condition , as in the Wheatstone bridge.
03
PYQ 2019
medium
physicsID: upsee-20
Two batteries of emf 6V and 3V with internal resistances and respectively are connected as shown in figure. the potential difference across A and B is
1
9V
2
5V
3
3V
4
1V
Official Solution
Correct Option: (2)
According to the question, we draw the circuit as below
04
PYQ 2019
medium
physicsID: upsee-20
Silicones are -
1
Organometallic compound
2
Compounds obtained from silica
3
Compounds obtained by hydrolysis of organo chloro silance
4
Mocromolucules prepared from silicates
Official Solution
Correct Option: (3)
Silicones are polymers that include any synthetic compound made up of reapeating units of siloxane. Silicones compound obtained by hydrolysis of organo chloro silane.
