Can there be negative magnetic flux?

In this case, the flux is negative. So, if you move a bar magnet towards a conducting loop such that the magnetic flux associated with the loop surface increases, there will be an induced current( whose direction is given by the red arrow ) whose magnetic field opposes the increase in magnetic flux.

Can the current be negative?

Yes, negative potential and negative current exist. Negative potential: Objects having excess supply of electrons (-ve charge) is said to be having negative potential.

Can the potential difference be negative?

As you step across the circuit elements in the same direction as the current in the element, the potential difference can be positive or negative. As there is no energy accumulation in the circuit, the increases in potential difference must be equal to the decreases in potential difference.

What do you understand by positive magnetic flux?

The magnetic flux is the net number of field lines passing through that surface; that is, the number passing through in one direction minus the number passing through in the other direction (see below for deciding in which direction the field lines carry a positive sign and in which they carry a negative sign).

Can a DC current be negative?

In a direct current (DC) circuit, current flows in one direction only, and one pole is always negative and the other pole is always positive. In an alternating current (AC) circuit the two poles alternate between negative and positive and the direction of the current (electron flow) reverses periodically.

Can a charge be negative?

Electric charge can be positive or negative (commonly carried by protons and electrons respectively). If there are more electrons than protons in a piece of matter, it will have a negative charge, if there are fewer it will have a positive charge, and if there are equal numbers it will be neutral.

How can potential be negative?

Potential is only defined relative to another point in the circuit, so there can always be a negative potential: if the potential at point A is positive in relation to point B, then the potential at point B is negative in relation to point A.

When is the flux of a magnetic field low?

when the angle between the magnetic field vector and the area vector is nearly equal to 90ᵒ, then the resulting flux is very low. When the angle is equal to 0ᵒ, the resulting flux is maximum.

Can a magnetic field have a negative value?

So you have to deal with the DOT PRODUCT of two vectors. That can be negative as cos (theta), where theta is the angle between the direction of the magnetic field and the normal unit vector associated to any arbitrary surface, varies between -1 to +1.

How do you express magnetic flux without surface integral?

Magnetic flux (without the general form with surface integral) can be expressed as: Where both B (magnetic induction) an S (surface that the flux goes through) are vectors. So you have to deal with the DOT PRODUCT of two vectors.

Is magnetic flux a scalar or vector quantity?

It is clear from the equation given above that the magnetic flux is a scalar quantity. Its SI unit is given as Weber (Wb) or tesla meter squared (Tm 2 ). The SI unit of magnetic flux is Weber (Wb) or tesla meter squared (Tm 2) named after German physicist Wilhelm Weber.