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- Chemical Reactions & Equations
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- Metals & Non Metals
- Carbon & Its Compounds
- Periodic Classification of Elements
- Life Processes
- Respiration
- Control and Coordination
- How Do Organism Reproduce
- Heredity and Evolution
- Light: Reflection and Refraction
- Human Eye and Colorful World
- Electricity
- Magnetic Effect of Electric Current
- Sources of Energy
- Our Environment
- Management of Natural Resources
Popular Questions
- A small valued resistance XY is connected across the end of a coil
- Four metal rods are placed, in turn, inside a coil of copper wire.
- Three plotting compasses are placed close to a solenoid carrying a current.
- To avoid risk of electrical shock, which phenomena is used
- Identify the region, where the magnetic fields arround a current carrying solenoid is uniform
- A circular metallic loop is kept above the wire AB as shown below.
- The diagram shows a coil of wire wound on a soft iron core forming an electromagnet.
- Assertion : The magnetic field is stronger at a point Reason : The magnetic field B produced by a straight current
- For the current carrying solenoid as shown below, draw magnetic field lines and give reasons
- Assertion : In an AC generator slip-rings type of commutator is used. Reason : Slip-rings are full rings with which the ends of co..
- Describe the whole working of the following circuit.
- The magnetic field in a given region is uniform. Draw a diagram to represent it.
- Choose the incorrect statement.
- Assertion : Electric appliances with metallic body have three connections Reason : Three pin connections reduce heating of connect..
- A ship is to reach a place 8° South of west.
- Assertion : To avoid risk of electrical shock, Reason : Earthing saves us from electrical shocks.
- Choose the correct option. The magnetic field inside a long straight solenoid carrying current
- Assertion : The magnetic field produced by Reason : The magnetic field inside the solenoid is uniform
- A positively charged particle (α-particles) projected towards West is deflected towards North by a magnetic field
- Identify the poles of a magnet in the figure.
- A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in the figure.
- AB is a current carrying conductor in the plane of the paper as shown in the figure.
- A rectangular loop carrying a current i is situated near long straight wire such that the wire is parallel to one of the sides of ..
- The magnetic field at a distance r from a long wire carrying current I is 0.4 Tesla
- How is induced current in a secondary coil related to current in a primary coil?
- A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON.
- A coil P is connected to a torch bulb and placed parallel to another coil Q as shown in the figure below
- A horizontal power line carries a current from East to West direction.
- Name the rule which gives the direction of induced current in a conductor.
- State Fleming left hand rule.
- State the principle of an electric generator.
- A magnetic compass needle is placed in the plane paper near point A as shown in figure.
- (i) State Flemings left hand rule. (ii) Write the principle of working of an electric motor. (iii) Explain the function of the fol..
- For a current in a long straight solenoid N and S-poles are created at two ends.
- Choose the correct option. A rectangular coil of copper wire is rotated in a magnetic field.
- The flow of current in a circular wire creates a magnetic field at its centre.
- What is the function of an earth wire?
- Explain the meanings of words "electromagnetic" and "induction" in the term electromagnetic induction.
- Name the type of current : (a) used in household supply (b) given by a cell
- (i) The figure shows a domestic electric circuit. (ii) Give one difference between the wires used in (iii) List two advantages of ..
