Magnetic Effects of Electric Current
Physics ⇒ Electricity and Magnetism
Magnetic Effects of Electric Current starts at 9 and continues till grade 12.
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See sample questions for grade 9
A current of 2 A flows through a straight conductor. If the current is reversed, what happens to the direction of the magnetic field?
A solenoid has 500 turns and carries a current of 2 A. If the number of turns is doubled, what happens to the magnetic field inside the solenoid?
A solenoid is 0.5 m long and has 1000 turns. What is the number of turns per meter?
A student observes that the needle of a magnetic compass placed near a wire deflects when the wire is connected to a battery. What does this observation indicate?
A wire carries a current of 5 A. If the current is doubled, how does the magnetic field at a fixed distance from the wire change?
Describe the pattern of magnetic field lines around a bar magnet.
Describe what happens when a magnetic compass is placed near a current-carrying wire.
Explain why a soft iron core is used inside a solenoid to make an electromagnet.
Explain why electric motors are important in daily life.
Explain why the magnetic field is stronger at the ends of a solenoid than at the center.
If a current-carrying conductor is placed perpendicular to a uniform magnetic field, what is the direction of the force acting on it?
If the direction of current in a solenoid is reversed, what happens to its north and south poles?
State Fleming's Left Hand Rule.
State one use of electromagnets in daily life.
State the unit of magnetic field strength in the SI system.
What is the function of a commutator in an electric motor?
What is the shape of the magnetic field lines inside a solenoid?
When an electric current passes through a straight conductor, what is produced around it?
Which device uses the magnetic effect of electric current to convert electrical energy into mechanical energy?
Who discovered the magnetic effect of electric current?
