Nootan Solutions DC Circuits and Measurements ISC Class-12 Physics

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Nootan Solutions DC Circuits and Measurements ISC Class-12 Physics Nageen Prakashan Chapter-6 Solved Numericals. Step by step Solutions of Kumar and Mittal ISC Physics Class-12 Nageen Prakashan Numericals Questions. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.

Nootan Solutions DC Circuits and Measurements ISC Class-12 Physics Chapter-6 Nageen Prakashan of Kumar and Mittal


Class: 12
Subject: Physics
Chapter 6: DC Circuits and Measurements
Board ISC
Writer /Publications Nootan / Nageen Prakashan/Kumar and Mittal
Topics Solved Numericals of page 272 , 273, 274, 275

Nootan Solutions Chapter-6 DC Circuits and Measurements ISC Class-12 Physics( Nageen Prakashan of Kumar and Mittal )

page-number : 272

Question 1,

The storage battery …………..   of Battery.

Answer

I = V / R Applying Ohm Law

= 12 / 0.4

= 30 Amp

Question 2

A cell ……………  cell

Answer

i = E / (R+r)

= 5 / (9+1)

= 0.5 Amp

Question 3

Potential difference …………. cell.

Answer

V = E – i r

4 = 6 – 2 r

2 r = 2

r = 1 ohm

Question 4

The emf ……….. resistor

Answer

DC Circuits and Measurements Nooan Solutions Q 4

Question 5

The potential …………….. cell

Answer

DC Circuits and Measurements Nooan Solutions Q 5

Question 6

a battery ……….. battery

Answer

DC Circuits and Measurements Nooan Solutions Q 6

Question 7

A 200 ohm …………….. circuit

Answer

DC Circuits and Measurements Nooan Solutions Q 7

Question 8

A high ……………… wire

Answer

DC Circuits and Measurements Nooan Solutions Q 8

Question 9

in the circuit ………….. of R

Answer

EMF of cell = reading of voltmeter when key is open

DC Circuits and Measurements Nooan Solutions Q 9

Question 10

A 10 V battery ……………….current

Answer

DC Circuits and Measurements Nooan Solutions Q 10

Question 11

Two battery ……………charging.

Answer

During charging

V – E = i r

V = E + i r

for first battery

V = 6.20 +20 x 0.01

=6.40 V

and for second battery

V = 12.45 + 0.03 x 20

=13.05 Volt

Question 12

Calculate ……………….. network

Answer

It is  an example of wheat stone bridge

therefore 5 ohm resistor remain inactive

DC Circuits and Measurements Nooan Solutions Q 12

Question 13

find …………… potential

Answer

Since M and N are at same potential. therefore it is an example of wheat stone bridge

DC Circuits and Measurements Nooan Solutions Q 13

Question 14

The adjoining …………… calculate R

Answer

resistance of parallel combination = X

then according to rule of wheatstone bridge

DC Circuits and Measurements Nooan Solutions Q 14

Question 15

calculate ……………..0.4 ohm

Answer

DC Circuits and Measurements Nooan Solutions Q 15


page-number : 273

Question 16

the ……………. balanced

Answer

current through arm ABC= 60/30

=2 amp

current through arm ACD = 60/10 =6 amp

(a)

DC Circuits and Measurements Nooan Solutions Q 16

(b) since D is at higher potential therefore current will pass from D to B

(c) let for balance bridge R(DC)is X then by the rule of balanced wheatstone bridge

10/20 =3/X

i.e. X = 6 ohm

Question 17

calculate ……………… resistor

Answer

(I) equivalent resistance

DC Circuits and Measurements Nooan Solutions Q 17

Question 18

calculate ……………… 60 V

Answer

Resistance of the circuit

DC Circuits and Measurements Nooan Solutions Q 18

=18 x 2.5 = 45 V

Question 19

Find …………….  of R

Answer

Voltage across 10 ohm

120-100 =20V

current in the circuit

=20/10

=2 amp

total resistance of parallel combination

DC Circuits and Measurements Nooan Solutions Q 19

Question 20

What …………. negligible

Answer

(a) when Key is off  8 ohm  become ineffective

DC Circuits and Measurements Nooan Solutions Q 20

Question 21

In steady …………………. circuit

Answer

PD across capacitor

= i R = 2 x 10 = 20 V

energy store in capacitor

DC Circuits and Measurements Nooan Solutions Q 21

Question 22

Compute ……………. resistor

Answer

the 2 ohm resistor in row of ammeter in series with other 3 , ohm resistor in parallel

therefore net resistance

DC Circuits and Measurements Nooan Solutions Q 22

Question 23

In the …………….. 75 ohm

Answer

DC Circuits and Measurements Nooan Solutions Q 23

Question 24

the …………….. voltameter

Answer

Resistance of circuit

DC Circuits and Measurements Nooan Solutions Q 24

Question 25

A network …………….. resistor

Answer

total external resistance

DC Circuits and Measurements Nooan Solutions Q 25


page-number : 274

Question 26

An 84 V DC ……………. connected

Answer

DC Circuits and Measurements Nooan Solutions Q 26

Question 27

Two cell ……………… each cell

Answer

in first case

DC Circuits and Measurements Nooan Solutions Q 27

Question 28

Two identical ……………. cell

Answer

as previous question

DC Circuits and Measurements Nooan Solutions Q 28

Question 29

50 bulb …………….under lit

Answer

total current taken by all bulb

= 50 x 0.6

= 30 amp

again current given by all accumulator

DC Circuits and Measurements Nooan Solutions Q 29

Question 30

three cell …………….. resistance

Answer

current through circuit

DC Circuits and Measurements Nooan Solutions Q 30

Question 31

Determined …………… diagram

Answer

those two cell are in parallel with internal resistance 3 ohm and 0 ohm

therefore effective emf

DC Circuits and Measurements Nooan Solutions Q 31

Question 32

In the ……………… negligible

Answer

DC Circuits and Measurements Nooan Solutions Q 32

Question 33

In the …………..

Answer

applying kirchaff law in loop

DC Circuits and Measurements Nooan Solutions Q 33

Question 34

Two cell ………………

Answer

applying kirchaff law

DC Circuits and Measurements Nooan Solutions Q 34


page-number : 275

Question 35

two cell of emf 6 V and 12 V …………..

Answer

DC Circuits and Measurements Nooan Solutions Q 35

Question 36

Two cell ……………..PDs.

Answer

DC Circuits and Measurements Nooan Solutions Q 36

this will same across cell also because the are in parallel

Question 37

three ……………….cell

Answer

DC Circuits and Measurements Nooan Solutions Q 37

r = 6 ohm

Question 38

Calculate …………….. resistance

Answer

applying kirchaff law

DC Circuits and Measurements Nooan Solutions Q 38

Question 39

In …………………. box

Answer

DC Circuits and Measurements Nooan Solutions Q 39

Question 40

In …………………… 70 cm

Answer

DC Circuits and Measurements Nooan Solutions Q 40

Question 41

A 3 V battery …………….reading .

Answer

(a)

reading of voltameter

3 x 0.5 = 1.5 V

(b)

if resistance of voltameter is 150 ohm then net resistance of 60  wire and voltameter

DC Circuits and Measurements Nooan Solutions Q 41 b

reading of voltameter

= i R = 0.505 x 2.94 =1.485 volt

Question 42

Potential …………….  potentiometer

Answer

Potential gradient = v / l

= 2/4

=0.5 v / m

Question 43

A 10 m Long ……………..potentiometer

Answer

DC Circuits and Measurements Nooan Solutions Q 43

again E = 0.0025 x 860

=2.15 V

max emf = p x total length

= 0.0025 x 1000

= 2.5 volt

Question 44

A potentiometer ………… AB

Answer

by the rule of wheat stone bridge

DC Circuits and Measurements Nooan Solutions Q 44

Question 45

A cell gives ………………  Cell

Answer

DC Circuits and Measurements Nooan Solutions Q 45

Question 46

A cell emf 1.25 V ………….. second cell .

Answer

Acording principle of potentiometer

DC Circuits and Measurements Nooan Solutions Q 46

= 2.25 V

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