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If cells are joined in parallel, they have _______.- a)same current
- b)same emf
- c)same potential difference
- d)same internal resistance
Correct answer is option 'C'. Can you explain this answer?
If cells are joined in parallel, they have _______.
a)
same current
b)
same emf
c)
same potential difference
d)
same internal resistance
|
Hansa Sharma answered |
Components connected in parallel provide alternative pathways for current flow. When cells are connected in parallel, the total voltages that they provide does not change. For example, when two or more 2 V cells are connected in parallel, they still provide a total voltage of 2 V.
- a)1 ohm
- b)0.5 ohm
- c)1.5 ohm
- d)2 ohm
Correct answer is 'A'. Can you explain this answer?
|
Infinity Academy answered |
1st case[series]
I=E+E/r+r+1-----1
2nd case[parallel]
I=E[E will be same in parallel]/(1/r)+(1/r)+(1/1)----2
Current in both cases are the same.
1=2
2E/2r+1=E/(2/r)+1
R=1 Ω
I=E+E/r+r+1-----1
2nd case[parallel]
I=E[E will be same in parallel]/(1/r)+(1/r)+(1/1)----2
Current in both cases are the same.
1=2
2E/2r+1=E/(2/r)+1
R=1 Ω
- a)0.75 A
- b)1.05 A
- c)2 A
- d)3 A
Correct answer is 'A'. Can you explain this answer?
|
Rohan Singh answered |
Total inner voltage E = 2*3 = 6.0 V
Total resist. Rt = 0.2*3*7.4 = 8.0 ohm
circulating current I = E/Rt = 6/8 = 3/4 = 0.75 A
- a)yes
- b)No
- c)Can’t predict
- d)None of the above
Correct answer is 'A'. Can you explain this answer?
|
Vaishnavi Nayak answered |
In series connection of cells total internal resistance=nr total resistance of circuit=nR current is same potential difference is different so,I=nv/nR+nr I=V/R+r current is same as before in parallel connection of cells total internal resistance=r/n total resistance of circuit=R/n total current=nI potential difference is same nI=V/r/n+R/n I=V/R+r current is same as before
- a)0.11 ohm
- b)0 ohm
- c)0. 12 ohm
- d)1.1 ohm
Correct answer is 'B'. Can you explain this answer?
|
|
Rajeev Saxena answered |
Total emf = 3 x 4 = 12 V
Total resistance = 6 + 3r
Current in the circuit = 2 A
Using ohms law
2 = 12/ (6+3r)
2(6+3r)=12
12+6r=12
6r = 12-12 = 0
r = 0/6 = 0
The equivalent emf of two cells (with ε1 > ε2) in series if we connect two negative electrodes of adjacent cells is- a)εequivalent =
- b)εequivalent =
- c)εequivalent = ε2 - ε1 (ε1 > ε2)
- d)εequivalent = ε1 - ε2 (ε1 > ε2)
Correct answer is option 'D'. Can you explain this answer?
The equivalent emf of two cells (with ε1 > ε2) in series if we connect two negative electrodes of adjacent cells is
a)
εequivalent =
b)
εequivalent =
c)
εequivalent = ε2 - ε1 (ε1 > ε2)
d)
εequivalent = ε1 - ε2 (ε1 > ε2)
|
Sushil Kumar answered |
When we connect cells to form a battery, we join opposite ends(+ve with -ve and vice versa) to get supporting emf, i.e. net emf get added, but when we join the same polarities(-ve with -ve, like in the question), they oppose each other, hence net emf is the difference b/w them.
The expression for equivalent emf when two cells of emf’s
εeq = ε1 - ε2 (ε1> ε2)
The expression for equivalent emf when two cells of emf’s
εeq = ε1 - ε2 (ε1> ε2)
When number of identical cells, in parallel combination are increased, the voltage of the circuit will- a)Increase
- b)Decrease
- c)Remain same
- d)Depends on the internal resistance of the battery
Correct answer is option 'C'. Can you explain this answer?
When number of identical cells, in parallel combination are increased, the voltage of the circuit will
a)
Increase
b)
Decrease
c)
Remain same
d)
Depends on the internal resistance of the battery
|
Lavanya Menon answered |
The voltage developed by the cells in parallel connection cannot be increased by increasing the number of cells present in the circuit. It is because they do not have the same circular path. In parallel connection the connection provides power based on one cell.
The voltage will remain the same.
The voltage will remain the same.
If cells are joined in series, they have ________.- a)same internal resistance
- b)same potential difference
- c)same emf
- d)same current
Correct answer is option 'D'. Can you explain this answer?
If cells are joined in series, they have ________.
a)
same internal resistance
b)
same potential difference
c)
same emf
d)
same current
|
.mie. answered |
In series circuit, the same current is flowing through each resistor...
but the voltage across each resistor varies...
because higher the value of resistance in resistor..
greater is the voltage drop acrosss that resistor....
In a circuit resistors are connected in series, the value of current through the circuit is- a)remains the same
- b)increases
- c)decreases
- d)becomes half
Correct answer is option 'A'. Can you explain this answer?
In a circuit resistors are connected in series, the value of current through the circuit is
a)
remains the same
b)
increases
c)
decreases
d)
becomes half
|
Ciel Knowledge answered |
When resistors are connected in series, the current through each resistor
remains the same.
The total voltage across all the resistors is equal to the sum of the
voltages across each resistor.
remains the same.
The total voltage across all the resistors is equal to the sum of the
voltages across each resistor.
, it would be a zero order reaction when- a)the rate of reaction is proportional to square of concentration of
- b)the rate of reaction remains same at any concentration of A
- c)the rate remains unchanged at any concentration of
and 
- d)the rate of reaction doubles if concentration of
is increased to double
Correct answer is option 'B'. Can you explain this answer?
, it would be a zero order reaction whena)
the rate of reaction is proportional to square of concentration of
b)
the rate of reaction remains same at any concentration of A
c)
the rate remains unchanged at any concentration of and
and d)
the rate of reaction doubles if concentration of is increased to double
is increased to double
|
Imk Pathsala answered |
For reaction 
If it is zero order reaction
, i. e the rate remains same at any concentration of ' 
. i.e independent upon concentration of A.
If it is zero order reaction
, i. e the rate remains same at any concentration of ' . i.e independent upon concentration of A.Chapter doubts & questions for July Week 1 - Weekly Tests for JEE Preparation 2025 is part of JEE exam preparation. The chapters have been prepared according to the JEE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for JEE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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