Electrical Engineering : Magnetism And Electromagnetism QUESTIONS AND ANSWERS :: part3 : 6 to 10

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

6.Which of the following materials are dia-magnetic ?

Silver

Copper

Silver and copper

Iron

7.If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity

less than that of disc but in opposite direction

equal to that of disc and in the same direction

equal to that of disc and in the opposite direction

less than that of disc and in the same direction

8.A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

M/2

2 M

M/4

9.A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the mag netic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?

Decreases

Increases

Remains same

First increases and then decreases depending on the depth of iron in�sertion

10.The commonly used material for shielding or screening magnetism is

copper

aluminium

soft iron

brass

More Magnetism And Electromagnetism QUESTIONS AND ANSWERS available in next pages