Particulate Electrical Forces Unit Test

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Higher

Forces on charged particles

Electric and magnetic fields both exert forces on charged particles. The motion of charged particles in these fields can be determined and used in particle accelerators.

Part of

Physics

Particles and waves

Forces on charged particles test questions

ane

Select the about accurate description of electrical field lines.

Lines around a charged object which decide the force on a mass in the field

Lines around a charged object which make up one's mind the force on another charged object

Lines around a charged object which determine the energy of another charged object

2

In which direction do the arrows of electric field lines betoken?

From negative to positive accuse

From positive to negative charge

Perpendicular to the field lines

3

How can the unit of measurement of electrical potential, the volt \((V)\) , too be expressed?

Joule coulombs \((JC)\)

Coulombs per joule \((CJ^{-1})\)

Joules per coulomb \((JC^{-one})\)

4

Summate the kinetic free energy of an electron of charge \(1.half dozen \times 10^{-nineteen}C\) accelerated by a potential difference of \(2500 V\) .

\[half dozen.4 \times 10^{-23}J\]

\[4 \times ten^{-16}J\]

\[1.56 \times 10^{22}J\]

v

An electron of mass \(9.11 \times 10^{-31}kg\) has a kinetic free energy of \(4 \times 10^{-sixteen}J\) . Calculate the speed of the electron.

\[2.09\times x^{7}ms^{-one}\]

\[2.96 \times x^{7}ms^{-ane}\]

\[eight.78\times 10^{xiv}ms^{-ane}\]

vi

If a vertical wire has a downwardly flowing current of electrons draw the resulting magnetic field.

An electric wire runs vertically. A current passes through it from top to bottom.

Concentric circles with arrows pointing clockwise

Concentric circles with arrows pointing anticlockwise

Lines pointing outward from the wire

7

A magnetic field is set upward going into the screen and a wire conveying an electron current flows left to right across the field.

In which direction volition the wire feel a force?

A magnetic field travels into the screen away from the viewer. A wire lies horizontally in the field. A current runs through the wire from left to right.

Towards the lesser of the screen

Towards the top of the screen

To the right

8

An electron moving left to right enters a magnetic field pointing out of the screen. Describe the motion of the electron simply every bit information technology enters the field.

A magnetic field travels out of the screen towards the viewer. An electron crosses it from left to right.

Accelerated to the right

Deflected downwards

Deflected upwards

9

An electron is travelling through a large area subject to a strong magnetic field.

Which of the following statements best describes its path?

Circular if the direction of the charge is parallel to the magnetic field lines

Straight if the management of the accuse is perpendicular to the magnetic field lines

Round if the management of the charge is perpendicular to the magnetic field lines

10

What use is made of a potent magnetic field inside a cyclotron?

To accelerate charged particles to a greater speed

To ensure the charged particles move in a circular path

To increase the charge on the particle