Question:
What do we call a substance which is repelled by a magnet?
Answer:
Diamagnetic
Question:
Magnetism at the centre of a bar magnet is _____
Answer:
Zero
Question:
Who discovered the principle of Dynamo?
Answer:
Werner von Siemens
Question:
What is the filament of a bulb made of ?
Answer:
Tungsten
Question:
What is the principle of Ball pen works?
Answer:
Surface tension and Gravity
