Question

1. The direction of the magnetic force on an electron moving through a magnetic field is the same as the direction of the vector formed by taking the cross product of the velocity with the magnetic field (v x B).

           True/ False

2. The magnetic field is also referred to as the magnetic flux _____________ [one word].

3. Consider a particle moving through a magnetic field. If the magnetic field doubles and the velocity of the particle halves, the magnetic force will:

      Quadruple- double- stay the same- halve- quarter

4. A circuit has an emf source, a resistor, a capacitor, and a switch, all in series, with the capacitor being uncharged and the switch being open. The switch is then closed. The magnitude of the voltage across the resistor then (Decrease/ Increase ) in time, while the magnitude of the voltage across the capacitor (Decrease/ Increase ) in Time.

5. The product of resistance, R, and capacitance, C, is a measure of how quickly a capacitor charges and is called the ________________ [two words] of the circuit.

6. The unifying principles of electromagnetism are expressed in :

     Oersted's equations- Maxwell's equations- Newton's equations- Einstein's equations

7. A circuit has an emf source, a resistor, a capacitor, and a switch, all in series, with the capacitor being uncharged and the switch being open. The switch is then closed. At the instant immediately after the switch is closed, the current through the resistor will be (zero/ nonzero) and the voltage across the capacitor will be (zero/ nonzero)

8. Household alternating current (AC) voltages are typically (120 v/ 240v) in the United States and Canada and typically ( 120/240) in Europe, with these voltages being defined as (peak/ peak to peak/ root mean squared ) voltage

9. Magnetic force, like electric force, can do work on a charged particle. (True/ False )

10. The direction of the magnetic field can be defined as the direction of the magnetic force on a:

Megnatic south pole / magnatic north pole / positive elec charge / negative elec charge .

Answer 1

(1) False: force on moving charged particle is given by,

Now, since the electron has negative charge force on it will be opposite to v​​​​​​×b

(2) density

(3) magnetic field doubles and velocity is halved. So force force remains same .