Which equation is used to calculate the magnetic force on a charge moving in a magnetic field?
2 answers:
Answer: The correct option is (B).
Explanation:
The force on a charge moving in a magnetic field is as follows;
Here, q is the charge, v is the velocity, B is the magnetic field and is the angle between the velocity and the magnetic field.
The magnetic force is perpendicular to both magnetic field and velocity. Its direction is determined by the right hand rule.
If the angle between the velocity and the magnetic field is 90 degree then the expression of the magnetic force becomes as;
Therefore, the correct option is (B).
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<h2>Answer: decreasing</h2>
An RC circuit is an electrical circuit composed of resistors and capacitors, where the charging time of the circuit is proportional to the magnitude of the electrical resistance
and the capacity
of the capacitor.
As shown below:
In this context, the electrical resistance is the opposition to the flow of electrons when moving through a conductor.
Therefore:
<h2>When a capacitor is being charged in an RC circuit, the current flowing through a resistor <u>decreases</u>.</h2>
And the correct option is b.