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CBSE - XII Science - Physics - Current Electricity
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Asked by amanpanday6384
22nd December 2022,
12:42 PM
CBSE - XII Science - Physics - Current Electricity
what is meant by electric power
Asked by suresh.garaga1976
1st June 2021,
9:27 AM
CBSE - XII Science - Physics - Current Electricity
Doubt
Asked by arushidabhade
30th July 2020,
10:34 PM
CBSE - XII Science - Physics - Current Electricity
You are given 48 cells each of 1.48 volt and resistance 0.3 ohm. How would you arrange them to produce greatest current in a circuit of 5 ohm resistance?
Asked by mridulabarua05
6th February 2019,
9:53 AM
CBSE - XII Science - Physics - Current Electricity
Please solve the following question
Asked by Balbir
7th February 2018,
5:33 PM
CBSE - XII Science - Physics - Current Electricity
qestion test of current electricity
Asked by akshay.beloshe
12th October 2017,
11:49 AM
CBSE - XII Science - Physics - Current Electricity
Q)The answer mentioned is 
plz.. kindly explain ????
Q)The answer mentioned is plz.. kindly explain ????
Asked by araima2001
15th July 2017,
12:32 PM
CBSE - XII Science - Physics - Current Electricity
In a circuit shown in figure if the internal resistances of the sources are negligible then at what value of resistance R will the thermal power generated in it will be the maximum. What is its value ?
(1)
3Ω
(2)
4Ω
(3)
6Ω
(4)
2Ω
|
In a circuit shown in figure if the internal resistances of the sources are negligible then at what value of resistance R will the thermal power generated in it will be the maximum. What is its value ?
|
| (1) | 3Ω | (2) | 4Ω | (3) | 6Ω | (4) | 2Ω |
Asked by devanshmalhotra2609
16th May 2016,
3:51 PM
CBSE - XII Science - Physics - Current Electricity
Why is current a scalar quantity but current density a vector quantity?
Asked by jovinraja
13th February 2016,
8:16 PM
CBSE - XII Science - Physics - Current Electricity
How will we find equivalent cell if in series cells are connected like a negative electrode with negative electrode of other cell find its equivalent and also tell me formula
Asked by srivastavaaman1998
8th August 2015,
2:13 PM
CBSE - XII Science - Physics - Current Electricity
mam/sir, i have a basic doubt .....will the electrons flow from the battery till the switch when the switch is off??
Asked by jithin
30th July 2015,
9:32 AM
CBSE - XII Science - Physics - Current Electricity
In the circuit the eight cells are identicl each of emf 5V and internal resistance 0.2 ohm . find the reading of the voltmeter.
Asked by Ibrahim Mohammed
8th May 2015,
10:51 AM
CBSE - XII Science - Physics - Current Electricity
Prove that the current density of a metallic conductor is directly proportional to the drift speed of electrons. Or A number of identical cells, n, each of emf E, internal resistance r connected in series are charged by a d.c. source of emf E′, using a resistor R. (i) Draw the circuit arrangement. (ii) Deduce the expressions for (a) the charging current and (b) the potential difference across the combination of the cells.
Asked by Topperlearning User
27th April 2015,
1:41 PM
CBSE - XII Science - Physics - Current Electricity
The plot of the variation of potential difference across a combination of three identical cells in series versus current is as shown below. What is the emf of each cell?
Asked by Topperlearning User
27th April 2015,
1:36 PM
CBSE - XII Science - Physics - Current Electricity
Two cells E1 and E2 in the given circuit diagram have an emf of 5 V and 9 V and internal resistance of 0.3 Ω and 1.2 Ω respectively. Calculate the value of current flowing through the resistance of 3 Ω
Asked by Topperlearning User
27th April 2015,
1:34 PM
CBSE - XII Science - Physics - Current Electricity
The following graph shows the variation of terminal potential difference V, across a combination of three cells in series to a resistor, versus current I : (i) calculate the emf of each cell. (ii) for what current I, will th power dissipation of the circuit be maximum ?
Asked by Topperlearning User
27th April 2015,
1:22 PM
CBSE - XII Science - Physics - Current Electricity
18 cells each of internal resistance 1 ohm and emf 2 V each are used to send current through an external circuit of 2 ohm resistance. Find the best mode of grouping them.
Asked by Topperlearning User
27th April 2015,
1:15 PM
CBSE - XII Science - Physics - Current Electricity
Why we use a combination of cells?
Asked by Topperlearning User
27th April 2015,
1:12 PM
CBSE - XII Science - Physics - Current Electricity
In a given circuit diagram = 2.0 V. = 6.0 V respectively and resistance r1, r2 and R are 2.0 W, 4.0 W and 10.0 W respectively. Calculate the value of current and indicate its direction. Also calculate the potential difference between the points (i) B and A (ii) A and C.
Asked by Topperlearning User
27th April 2015,
1:11 PM
CBSE - XII Science - Physics - Current Electricity
Which combination of cells is the best to get maximum current, when the external resistance is much higher than the total internal resistance?
Asked by Topperlearning User
24th April 2015,
3:53 PM
CBSE - XII Science - Physics - Current Electricity
In which condition, the current through the mixed grouping of cells is maximum?
Asked by Topperlearning User
24th April 2015,
3:53 PM
CBSE - XII Science - Physics - Current Electricity
In which condition, the cells connected in parallel has maximum current?
Asked by Topperlearning User
24th April 2015,
3:52 PM
CBSE - XII Science - Physics - Current Electricity
In the circuit shown, each battery is of 5 V and has internal resistance of 0.2 ohm. What will be the reading of an ideal voltmeter connecting across the battery?
Asked by Topperlearning User
24th April 2015,
3:51 PM
CBSE - XII Science - Physics - Current Electricity
In given circuit the cells E1 and E2 have emfs 4 V and 8 V and the internal resistance 0.5 ohm and 10 ohm respectively. Calculate the current in each resistance.
Asked by Topperlearning User
24th April 2015,
3:47 PM
CBSE - XII Science - Physics - Current Electricity
Three identical cells, each of emf 2 V and internal resistance 0.2 ohm are connected in series to an external resistor of 5.4 ohm. Calculate the current in the circuit.
Asked by Topperlearning User
24th April 2015,
3:37 PM
CBSE - XII Science - Physics - Current Electricity
For the series combination of cells, derive the condition in which the current through externally connected resistance is maximum.
Asked by Topperlearning User
24th April 2015,
3:36 PM
CBSE - XII Science - Physics - Current Electricity
when n cells are connected in parallel , the emf of the combination remains equal to the emf of single cell.why?
Asked by shaktiisgreat000
26th July 2014,
2:33 PM
