Question
Give four differences between an electromagnet and a permanent magnet.
✓
Answer
Differences between an Electromagnet and a Permanent Magnet
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
More "[3 Mark Question Answer]" from Electromagnetism, Magnetic Effects of Electric Current, Electromagnetic Induction→Electromagnetism, Magnetic Effects of Electric Current, Electromagnetic Induction — all question types→Physics STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→
Similar questions
When a body vibrates under a periodic force, the vibrations of the body are:
natural vibrations
Damped vibrations
Forced vibration
Resonant vibrations
A uniform flat circular rim is balanced on a sharp vertical nai by supporting it at point A, as shown in the figure. Mark the position of the centre of gravity of the rim in the diagram by the letter G.
Draw a ray diagram to show the formation of an inverted and diminished image of an object by a lens. Name the lens used. State the position of the object with respect to the lens used. State one more characteristic of the image.
The diagram shows a coil connected to a center zero galvanometerG . The galvanometer shows a deflect ion to the right when the north pole N of a powerful magnet is moved to the right as shown .
(i) Explain, why the defelct ion occurs in the galvanometer.
(ii ) State whether th e current in the coil is cl ockwise or anticl ockwise
when viewed from the end P.
(iii ) State th e observation in G when the coil is moved away from north
pole N of the magnet keeping the magnet stationary.
(iv)State the observation in G when both the coil and the magnet are
moved to right at th e same speed .
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
$(i)\ (a)$ Study the diagram alongside and calculate the moment of couple.
$(b)$ Two forces $F_1= F_2$ are applied on a wheel of radius $1.5\ m,$ such that moment of couple is $30\ Nm$. Calculate the magnitude of each of the force.
$(ii)\ A$ force of $50\ N$ produces a moment of force of $10\ Nm$ in a rigid body. Calculate the perpendicular distance between the point of application of force and the turning point.
$(iii)\ (a)$ State the laws of moments.
$(b)$ The diagram shows a wheel of diameter $4\ m,$ and pivoted at $O$. Calculate the moment of force about point $(1)\ O, (2)\ Q,$ when a force$ F = 4N$ acts at point $P$ or $Q$.
→$(b)$ Two forces $F_1= F_2$ are applied on a wheel of radius $1.5\ m,$ such that moment of couple is $30\ Nm$. Calculate the magnitude of each of the force.
$(ii)\ A$ force of $50\ N$ produces a moment of force of $10\ Nm$ in a rigid body. Calculate the perpendicular distance between the point of application of force and the turning point.
$(iii)\ (a)$ State the laws of moments.
$(b)$ The diagram shows a wheel of diameter $4\ m,$ and pivoted at $O$. Calculate the moment of force about point $(1)\ O, (2)\ Q,$ when a force$ F = 4N$ acts at point $P$ or $Q$.
A box of weight $150$ kgf has gravitational potential energy stored in it equal to $14700 J$. Find the height of the box above the ground. (Take $g = 9.8 N kg^{-1})$
→Can light be ‘piped’ like sound in a doctor’s stethoscope?
$40g$ of ice at $0^\circ C$ is used to bring down the temperature of a certain mass of water at $60^\circ C$ to $10^\circ C$. Find the mass of water used.
[Specific heat capacity of water $= 4200 J kg^{-1} ^\circ C^{-1}]$
[Specific latent heat of fusion of ice $= 336 \times 10^3 J kg^{-1}]$
→[Specific heat capacity of water $= 4200 J kg^{-1} ^\circ C^{-1}]$
[Specific latent heat of fusion of ice $= 336 \times 10^3 J kg^{-1}]$
Name the three constituent of an atom and state their mass and charge of each. How are they distributed in an atom?