MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Earn 100

Show how the turning effect of a d.c.motor can be increased.

Important Questions on Electromagnetic Forces

MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.2>Q 3
Describe the effect on the motor when the direction of both the magnetic field and the current were reversed whilst simultaneously increasing the current.
EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.2>Q 4
State what would be observed if the alternating current was passed through a coil of a d.c. motor.
HARD
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.2>Q 4

A learner built a motor to run on a d.c. supply. The learner forgot to include a commutator. State what would be observed when the motor is switched on.

 

EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.3>Q 1
Show how the direction of the force on a current carrying conductor could be reversed.
MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.3>Q 5
You want to deflect the beam of electrons horizontally towards you. State which direction you should apply the magnetic field.
EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.3>Q 6
Explain why a magnetic field can deflect a beam of protons but not a beam of neutrons.
HARD
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.3>Q 7
You Want to deflect a beam of protons by the same amount as a beam of electrons. State the change you will make to your experiment. Explain your answer.
HARD
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 20 - Electromagnetic Forces>Exercise 20.3>Q 8
Explain why this effect(charged particles moving in a magnetic field) explains Northern and Southern lights.