Define the potential difference between two points.

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Potential difference, also known as voltage, is a measure of the electrical potential energy difference between two points in an electric circuit. It represents the amount of energy required to move a unit charge from one point to another in the circuit.

The potential difference between any two points is defined as the amount of work done to move a unit of positive charge without acceleration from one point to another between the two points.
It is denoted by dV.

dv = \(dw \over dq\)

The potential difference between two points in a circuit can be thought of as the electrical equivalent of the height difference between two points in a gravitational field.
Just as the height difference determines the amount of potential energy that an object possesses, the potential difference between two points in a circuit determines the amount of energy that is available to be transferred to the circuit's components.
Potential difference is usually measured in volts (V), which is a unit of electrical potential.

potential difference

Therefore, the potential difference between two points in a circuit is a measure of the electrical potential energy difference between those two points and represents the amount of energy that is available to be transferred to the circuit's components.

The potential difference between baby two points A and B is the shift in the potential energy of a charge q, divided by the charge when it’s shifted from A to B.

Vb – Va = \({U_b - U_a \over q} = {W_{ab}\over q} = dV\)

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Define the potential difference between two points.

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Define the potential difference between two points.

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2.The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

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4.Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

5. If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

6.Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

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A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

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