Popular Questions
- When does an electric short circuit occur?
- Why does a compass needle get defected when brought near a bar magnet?
- Draw magnetic field lines around a bar magnet
- List the properties of magnetic lines of force
- Why do not two magnetic lines of force intersect with each other?
- Consider a circular loop of wire lying in the plane of table
- The magnetic field in a given region is uniform. Draw a diagram to represent it.
- Choose the correct option. The magnetic field inside a long straight solenoid carrying current
- Which of the following property of a proton can change
- In Activity 7, how do we think the displacement of rod AB will be affected, if
- A positively charged particle (α-particles) projected towards West is deflected towards North by a magnetic field
- State Fleming left hand rule.
- What is the principle of an electric motor?
- What is the role of the split ring in an electric motor?
- Explain different ways to induce current in coil
- State the principle of an electric generator.
- Name some sources of direct current
- Which sources produce Alternating Current?
- Choose the correct option. A rectangular coil of copper wire is rotated in a magnetic field.
- Name two safety measures commonly used in electric circuit and appliances.
- An electric oven of 2 kW power rating is operated in a domestic circuit (220 V)
- What precautions should be taken to avoid the overloading of domestic electric circuits?
- Choose the incorrect statement from the following regarding magnetic lines of field
- A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in the figure.
- A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON.
- The strength of magnetic field inside a long current carrying straight solenoid is
- For a current in a long straight solenoid N and S-poles are created at two ends.
- Commercial electric motors do not use
- The most important safety method used for protecting home appliances from short circuiting or overloading is
- Magnetic field due to a current through a straight conductor depends on
- The magnetic field at a distance r from a long wire carrying current I is 0.4 Tesla
- Force on current carrying conductor in a magnetic field depends on
- To avoid risk of electrical shock, which phenomena is used
- Assertion : The magnetic field produced by Reason : The magnetic field inside the solenoid is uniform
- Assertion : The magnetic field is stronger at a point Reason : The magnetic field B produced by a straight current
- Assertion : Electric appliances with metallic body have three connections Reason : Three pin connections reduce heating of connect..
- Assertion : A current carrying conductor experiences a force in a magnetic field Reason : The force acting on a current carrying c..
- What is meant by magnetic field?
- How is the direction of magnetic field at a point determined?
- Identify the poles of a magnet in the figure.
