Physics Quiz (Ahsanium Z)

An electric current is passed through a coil of wire.

Which diagram shows the shape of the magnetic field produced in the middle of the coil?

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Two soft-iron rods are placed end to end inside a coil which is connected to a battery.

The connections from the battery to the coil are now reversed. What happens to the soft-iron rods in each case?

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An electron moves into a uniform magnetic field. The arrow shows the initial direction of motion of the electron. The direction of the magnetic field is into the plane of the page (away from you). In which direction does a force act on the electron when it enters the magnetic field?

• into the page

• out of the page

• towards the bottom of the page

• towards the top of the page

The diagram shows the magnetic field around two bar magnets.Which diagram shows the poles of the magnets?

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Three cores of different metals, P, Q and R, are placed inside identical coils of wire. At least one of the metals is non-ferrous. The cores are held above some iron nails. The three diagrams below show what happens when there is a current in the coils.

The three diagrams below show what happens when the current is then switched off. Which row identifies whether the core metals are ferrous or non-ferrous?

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