Double Touch Method

Q. State three important uses of a magnet.

Q.

What are the seven types of magnets?

Q.

Why did belinda tickle the dragon?

Q. The relationship between electricity and magnetism was first discovered in which of the following pairs?

1. Two clouds
2. Current carrying wire and magnetic compass
3. Between two bar magnets
4. Earth and magnetic compass

Q. A magnet was brought from various directions towards a toy boat that was floating in a water tub. The observed effect in each case is mentioned in Column I. Possible reason for the observed effects are mentioned in Column II. Match the statements in Column I and Column II. [5 MARKS]
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{Boat gets attracted towards the bar magnet.}& \text{Boat is fitted with a bar magnet with north pole towards its head.}\\ \text{Boat is not affected by the magnet.}& \text{Boat is fitted with a bar magnet with south pole towards its head.}\\ \text{Boat moves towards the magnet if north pole of the magnet is brought near its head.}& \text{Boat has a small magnet fixed along its length.}\\ \text{Boat moves away the magnet if north pole of the magnet is brought near its head.}& \text{Boat is made of magnetic material}\\ \text{Boat floats without changing its direction.}& \text{Boat is made of non-magnetic material}\end{array}$

Q. State three important uses of a magnet.

Q. A conductor of length l and mass m is placed along east-west line o. A table. Suddenly a certain amount of charge is passed through it and it is found to jump to a height h. The earths magnetic induction is B. The charge passed through the conductor is how much?

Q. ntA straight horizontal wire placed on a table and carries a current from east to west, then the direction of magnetic force on the wire is?n

Q. Give me atleast 5 experiments related to magnets which do not need batteries or cells (electricity)

Q. In the figure, single touch method of magnetisation is shown. The end $A$ acquires ___________.

1. North pole
2. South pole
3. It depends on the strength of bar magnet used
4. It depends on the amount of orientation of domain present at that end

Q. A sphere of radius R with charge Q uniformly distributed over it is rotated with angular speed omega around its diameter. Find magnetic moment associated with it.

Q. How is an artificial magnet prepared from a natural magnet?

Q. A wire seems to have charge flowing through it. When a compass is kept next to it, the needle gets deflected. The reason for the deflection is:

1. The flow of charges have an associated magnetic field
2. The charges force the needle into deflecting
3. The needle is loosely fit
4. The needle has no deflection

Q. proof net magnatic force at centre of current carrying loop

Q. A magnetic field can be produced by

1. A changing electric filed
2. Both of these
3. None of these
4. A moving charge

Q. Magnets are used in making which of the following?

1. Motors
2. Tables
3. Electrical wires
4. Plastic Toys

Q.

Listed below are the uses of magnets and electromagnets. Indicate whether a permanent magnet for electromagnet is used in each of the cases with an explanation.

Washing machine

Q. Why is it not possible to isolate a single magnetic pole?

Q. How is the single-touch method of magnetism different from the double-touch method:

Q. Write true or false for each statement.
Single touch method is better than the electrical method for making a magnet.

1. True
2. False

Q.

Magnets can be prepared by

1. magnetic induction method

2. single-touch method

3. double-touch method

4. all of the above