Magnetic effects of currents and the motor effect - Eduqas test questions - Eduqas

1

What will increase the strength of the magnetic field around a wire carrying a current?

2

What is the effect of putting an iron core inside a solenoid?

3

An electric current flows through a wire. What happens to the magnetic field strength when the wire is shaped into a solenoid?

4

What do a bar magnet and a solenoid have in common?

5

Which of the following does NOT increase the strength of the magnetic field produced by an electromagnet?

6

What is the direction of the force produced on a wire carrying a current when placed in a magnetic field?

7

When using Fleming's left-hand rule, what does the thumb direction represent? - Higher

8

0.4 A flows in 0.1 m of wire in a 0.7 T magnetic field. What force acts on the wire? - Higher

9

In a dc motor, what is the function of the split ring commutator? - Higher

10

A wire wrapped around an iron ‘C’ core makes an electromagnet. What effect will increasing the number of turns of wire have on it?