Magnet Quiz 1

Question 1

Erina was observing a magnet which was hanging or suspended using a string from a rigid roof that always aligns in the same direction. She asked her dad about this and he gave an extraordinary answer. What will be her father’s reply?

Accepted Answer

Due to the directive property of the magnet.

Answer

Due to the attractive property of magnet.

Answer

Both $$(a)$$ and $$(b)$$

Answer

None of these

Question 2

Ramu was having some doubts regarding the ways to find out the poles of a magnet. Can you please help him?

Accepted Answer

By keeping some iron filings near a ferromagnetic bar magnet.

Answer

By dipping a magnet inside water.

Answer

By applying some force on the bar magnet.

Answer

All of these.

Question 3

Deepu was having a magnet in his hands which has a magnetic field mentioned as $$5.6	ext{ }T$$. He moved this magnet near to an iron slab lying at an angle $$45{}^\circ $$ to each other with a velocity mentioned as $$3	ext{ }m{{s}^{-1}}$$.  What will be the value of magnetic force if the charge of the magnet is $$2	ext{ }C$$?

Accepted Answer

$$23.75	ext{ }N$$

Answer

$$33.21	ext{ }N$$

Answer

$$45.67	ext{ }N$$

Answer

None of these

Question 4

Beena found that the magnetic force experienced over a metallic wire when a magnet is kept normally at a distance $$3	ext{ }cm$$ is $$3.5	ext{ }N$$. What will be the value of the magnetic field experienced over the same metallic wire when a magnet has been kept normally at distance $$9	ext{ }cm$$ approximately? Let the length of the metallic wire be $$1	ext{ c}m$$ and the amount of current passing through the wire be $$5	ext{ }A$$.

Accepted Answer

$$23.32	ext{ }T$$

Answer

$$13.87	ext{ }T$$

Answer

$$17.54	ext{ }T$$

Answer

$$0	ext{ }T$$

Question 5

A current carrying wire is having an electric field as well as magnetic field perpendicular to it. Simmi measured the electric field as $$2	ext{ }V{{m}^{-1}}$$  and the resistance of the wire as $$5	ext{ k}\Omega $$. If the length of the current carrying wire is $$50	ext{ }cm$$ and the potential difference developed be $$9	ext{ }V$$. Calculate the total force in this case.

Accepted Answer

$$5.94	imes {{10}^{-4}}	ext{ }N$$

Answer

$$14.4	imes {{10}^{-4}}	ext{ }N$$

Answer

$$1.6	imes {{10}^{-4}}	ext{ }N$$

Answer

None of these