State two differences between an electromagnet and a permanent ma… - Vidyadip

Question

State two differences between an electromagnet and a permanent magnet.

✓

Answer

Electromagnet	Permanent magnet
It is made up of soft iron	It is made up of steel
The magnetic field strength can be changed	The magnetic field strength cannot be changed
Electromagnets of very strong field can be made.	Permanent magnets are not so strong.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Magnetism→Magnetism — all question types→PHYSICS STD 9 question papers→ICSE Board STD 9 question papers→ICSE Board question paper generator→

Similar questions

A screw gauge has a least count 0.001 cm and zero error +0.007 cm. Draw a neat diagram to represent it.

When a shot is fired from a gun, the gun is recoiled. Explain.

The least count of a vernier callipers is 0.01 cm and it has an error of +0.07 cm . While measuring the radius of a sphere, the main scale reading is 2.90 cm and the 5 th vernier scale division coincides with main scale. Calculate the correct radius.

At sea level, the atmospheric pressure is $1.04 \times 10^5$ Pa. Assuming $g =10 m s ^{-2}$ and density of air to be uniform and equal to 1.3 $kg m ^{-3}$, find the height of the atmosphere.

Explain, why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.

A.metal cube of 5 cm edge and relative density 9 is suspended by a thread so as to be completely immersed in a liquid of relative density 1.2 . Find the tension in the thread.

State the functions of decomposers in an ecosystem.

A force of 10 N acts on a body of mass 2 kg for 3 s, initially at rest. Calculate : The velocity acquired by the body

The force of attraction between two bodies at certain separation is 10 N. What will be the force of attraction between them if the separation is reduced to half?

Draw the speed-time graph of a body starting from some point P, gradually picking up speed, then running at a uniform speed and finally slowing down to stop at some point Q.