# Magnetic Effect of an Electric Current

1. Which of the following statement is TRUE concerning the magnetic field pattern of a solenoid?

Question 1 of 26

2. How can one increase the strength of the magnetic field of a current in a circuit?

Question 2 of 26

3. Which rule is used to predict the direction of force of a conductor carrying current in a magnetic field?

Question 3 of 26

4. Increasing the size of the current in the solenoid will also increase the strength of an electromagnet. True or False?

Question 4 of 26

5. Which of the following factors will affect the strength of an electromagnet?

Question 5 of 26

6. Which of the following rules states that if a conductor carrying a current is grasped in the right hand with the thumb pointing along the wire in the direction of the conventional current, the fingers will point in the direction of the magnetic field.

Question 6 of 26

7. Which of the following statements is INCORRECT about the magnetic strength of an electromagnet?

Question 7 of 26

8. Increasing the number of turns of wires in the solenoid will reduce the strength of an electromagnet. True or False?

Question 8 of 26

9. Mention 2 ways of reversing the force produced when a current carrying conductor is placed in a magnetic field of a magnet?

Question 9 of 26

10. Which of the following rule states that: if the left hand is held with the thumb, the first and the second fingers mutually at right angles so that the first finger points in the direction of the current, then the thumb points in the direction of the motion.

Question 10 of 26

11. Which of the two rules can help you predict the direction of magnetic field produced by a straight conductor.

Question 11 of 26

12. The right hand Grip rule can also be applied to predict the north pole of an electromagnet (many loop conductor). True or False?

Question 12 of 26

13. Which of the following rules states that if the fingers of the right hand encircle the current loop such that they point in the direction of current the thumb points in the direction of the magnetic field formed through the inside of the loop.

Question 13 of 26

14. An electromagnet is a type of a magnet which gets magnetized when electricity flows through it and loses magnetism when the current is cut off.

Question 14 of 26

15. Which of the following statement is CORRECT about a magnetic field produced by a straight conductor?

Question 15 of 26

16. Which of the following rule predicts the direction of magnetic field produced by a straight conductor?

Question 16 of 26

17. Which of the following rules states that if a right handed screw is driven forward in the direction of the conventional current, then the direction of rotation of the screw is the direction of the produced magnetic field lines.

Question 17 of 26

18. Which of the following statements is CORRECT about the force on a current carrying conductor when placed in a magnetic field of a magnet?

Question 18 of 26

19. What is the purpose of Ampere's swimming rule?

Question 19 of 26

20. Which of the following is not an application of electromagnets

Question 20 of 26

21. Mention the ways in which you can improve the strength a simple electric d.c motor?

Question 21 of 26

22. The right hand grip rule is used for 2 types of conductors mention them?

Question 22 of 26

23. Which rule states that: if one imagines one is swimming along a wire in the direction of the current and facing the compass needle, the north pole of the needle will be deflected towards the swimmers left hand?

Question 23 of 26

24. Define a solenoid

Question 24 of 26

25. When charges flow [electric current] through a circuit they have an associated magnetic field. True or False

Question 25 of 26

26. Which of the following rule states that if a coil carrying current is held in the right hand such that the fingers encircle the loops while pointing in the direction of current flow, the thumb points in the direction of North Pole?

Question 26 of 26