Current Electricity - Electric Current

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Q1. What is the total current in a parallel circuit with two branches carrying 2 A and 3 A respectively? (2023)

Solution:

In a parallel circuit, the total current is the sum of the currents in the branches: 2 A + 3 A = 5 A.

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Q2. What is the direction of conventional current? (2021)

Solution:

Conventional current is defined as the flow of positive charge, which is from positive to negative.

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Q3. What is the charge of one coulomb equivalent to in terms of electrons? (2022)

Solution:

One coulomb is equivalent to approximately 6.25 x 10^18 electrons.

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Q4. What is the charge of one coulomb equivalent to in terms of electric current and time? (2022)

Solution:

1 coulomb is the charge that passes through a conductor when a current of 1 ampere flows for 1 second.

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Q5. What happens to the current in a series circuit if one of the components fails? (2019)

Solution:

In a series circuit, if one component fails, the current stops flowing through the entire circuit.

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Q6. What is the charge of one coulomb in terms of the number of electrons? (2023)

Solution:

One coulomb is equivalent to approximately 6.25 x 10^18 electrons.

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Q7. What happens to the total current in a parallel circuit when more branches are added? (2019)

Solution:

In a parallel circuit, adding more branches increases the total current.

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Q8. What is the total current flowing in a circuit with three resistors in parallel, each carrying 2 A? (2021)

Solution:

In parallel, the total current is the sum of the currents: 2 A + 2 A + 2 A = 6 A.

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Q9. What is the effect of increasing the resistance in a circuit while keeping the voltage constant? (2019)

Solution:

According to Ohm's law, if resistance increases while voltage remains constant, current decreases.

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Q10. If the current through a conductor is doubled, what happens to the heat produced in the conductor? (2020)

Solution:

The heat produced is proportional to the square of the current (H ∝ I²), so if I is doubled, heat becomes 4 times.