Which of the following statements are true? Check all that apply. 1. In a circuit, current is delivered by the positive terminal

Question

2 years ago

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Which of the following statements are true? Check all that apply. 1. In a circuit, current is delivered by the positive terminal

of a battery, and it is used up by the time it returns to the negative terminal of the battery. 2. When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field. 3. By convention, the direction of a current is taken to be the direction of flow for negative charges. 4. In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges. 5. Current is the total amount of charge that passes through a conductor's full cross section at any point per unit of time. I've been reading this chapter in my book over and over and I still can't figure this out. I'd really appreciate some help! Thanks.

Physics

2 answers:

SOVA2 [1] · Answer 1 · 2023-12-12T11:37:31+03:00

Answer:

only statements 4 and 5 are correct.

4.In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges.

5. Current is the total amount of charge that passes through a conductor's full cross section at any point per unit of time.

Explanation:

statement 4 is true:

In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges.

Reason:

As we know there are three conditions for the current to flow as;

1. close loop

2. load or resistance

3. potential difference.

This potential difference is an example of a steady force which maintains a steady flow of current in a conductor.

Statement 5 is true:

Current is the total amount of charge that passes through a conductor's full cross section at any point per unit of time.

Reason:

As we know the definition of current is flow of charge per unit time i.e.

$I=\frac{Q}{t}$

where Q is the total charge and t is the time required for the charge to flow through a conductor.

alexandr402 [8] · Answer 2 · 2023-12-12T10:03:22+03:00

Answer:

4. In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges

5.Current is the total amount of charge that passes through a conductor's full cross section at any point per unit of time

Explanation:

5 is correct because current has the formula I=q/t which is the amount of charge per unit time .

4. Current flow has to be maintained with some amount of force due to its involvement with moving of electrons.