Cells in Series and in Parallel

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Physics
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10th - 12th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of combining cells in an electric circuit?
To increase the resistance
To simplify the calculation of currents and voltages
To decrease the EMF
To increase the complexity of the circuit
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a series combination of two cells, what is the potential difference between the positive and negative terminals of the first cell?
I*(R1 + R2)
E1 + E2
E2 - I*R2
E1 - I*R1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the equivalent EMF of a series combination of N cells determined?
By taking the average of their EMFs
By subtracting the smallest EMF from the largest
By summing their individual EMFs
By multiplying their individual EMFs
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the equivalent internal resistance of a series combination of N cells?
The average of their internal resistances
The product of their internal resistances
The sum of their internal resistances
The difference between the largest and smallest internal resistance
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a parallel combination of cells, what is the relationship between the total current and the currents from individual cells?
The total current is the product of individual currents
The total current is the sum of individual currents
The total current is the difference between the largest and smallest current
The total current is the average of individual currents
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the equivalent EMF of a parallel combination of two cells calculated?
By using the formula: (E1*R2 + E2*R1) / (R1 + R2)
By adding the EMFs of the two cells
By subtracting the EMF of the second cell from the first
By multiplying the EMFs of the two cells
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the equations for parallel combinations if the negative terminal of the second cell is connected to the positive terminal of the first?
The equations become invalid
The equations remain valid but Epsilon 2 is considered negative
The equations need to be recalculated
The equations remain unchanged
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