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Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.14. In the meter bridge experimental set up, shown in the figure, the null point 'D' is obtained at a distance of 40 cm from end A of the meter bridge wire. If a resistance of 10
Ω
is connected in series with R1 null point is obtained at AD = 60 cm. Calculate the value of R1 and R2.
Answer
1
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q21 a. Derive an expression for (a) the common potential and (b) the energy lost when the charged capacitor
C
1
is disconnected from the source of p.d.
V
1
and connected in parallel with another capacitor
C
2
charged by a different source of potential difference
V
2
. Where does this loss of energy appear?
Answer
5
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.11. Calculate the current through each resistor.
Answer
2
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.8. Calculate the current, in each branch of the given circuit, using Kirchhoff's laws.
Answer
1
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.4. In the given circuit determine the value of E and
I
1
a
n
d
I
2
[
I
1
= - 5 A, I = 8 A, E = 40 V]
Answer
1
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q 3
3.
Determine the current drawn from a 12 V supply (with internal resistance 0.5
Ω
) by the infinite network shown. Each resistor has a resistance of 1
Ω
only.
R = 2.73 ohm, I = 3.72A)
Answer
1
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.2. Find current through each branch.
[
I
1
= - 0.143 A &
I
2
= 0.429A]
Answer
1
Noel George Cherian
Subject: Physics
, asked on 20/5/18
Q.1. Find the current and potential drop across each resistor.
[I = 0.9 A, 7.2 V, 10.8 V]
Answer
1
Aditya
Subject: Physics
, asked on 20/5/18
a wire has a resistance equal to r if its length is increased by 75 % . what is the fractional change in theresistance of the wire
Answer
1
Royel Ghost
Subject: Physics
, asked on 19/5/18
Please solve question no. 3 .....with detailed steps .....will the current in the fig (b) remains same throughout or is distributed...give reasons...???
Example 3
Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4
Ω
resistance. Also find the potential difference between A and D.
(CBSE 2012)
Answer
2
Alok Singh
Subject: Physics
, asked on 18/5/18
Why in potentiometer the emf of the cell which we have to calculate is less than the other cell?
Answer
1
Mitali
Subject: Physics
, asked on 18/5/18
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Answer
1
Mitali
Subject: Physics
, asked on 18/5/18
An aluminium wire of diameter 0.24 cm is connected in series to a copper wire of diameter 0.16 cm. The wires carry an electric current of 10 A. Determine the current density in aluminium wire.
Answer
1
Royel Ghost
Subject: Physics
, asked on 18/5/18
Pls solve no. 65... Give detailed steps ..and the formula used in this question..with reasons...
Q.Example 65. Calculate the potential difference between points B and D of the network of resistances shown in Fig.2(a). 39.
Answer
2
Pallavi Chauhan
Subject: Physics
, asked on 17/5/18
Answer all questions after3 rd one plZ
Answer
1
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What are you looking for?
[ = - 5 A, I = 8 A, E = 40 V]
3. Determine the current drawn from a 12 V supply (with internal resistance 0.5) by the infinite network shown. Each resistor has a resistance of 1 only.
R = 2.73 ohm, I = 3.72A)
[ = - 0.143 A & = 0.429A]
[I = 0.9 A, 7.2 V, 10.8 V]
Example 3 Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4 resistance. Also find the potential difference between A and D. (CBSE 2012)
Q.Example 65. Calculate the potential difference between points B and D of the network of resistances shown in Fig.2(a). 39.