Home
Class 10
PHYSICS
Some devices are given here a) Solenoi...

Some devices are given here
a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC)
Which of the above forms a magnetic field when current is passed?

Text Solution

Verified by Experts

Solenoid and motor form a magnetic field when current is passed.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETISM

    VGS PUBLICATION-BRILLIANT|Exercise CREATIVE QUESTION FOR NEW MODEL EXAMINATION (SEC-3)CONCEPTUAL UNDERSTANDING|35 Videos

  • ELECTRIC CURRENT

    VGS PUBLICATION-BRILLIANT|Exercise SECTION - IV (4 Marks Questions)|16 Videos

  • FLOATING BODIES

    VGS PUBLICATION-BRILLIANT|Exercise OBJECTIVE TYPE QUESTIONS|40 Videos

Similar Questions

Explore conceptually related problems

Some devices are given here a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC) Which of the above are related to uniform magnetic fields?

Some devices are given here a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC) What is the difference between 'd' and 'e'?

Some devices are given here a) Solenoid b) Bar magnet c) Motor d) generator (AC) e) Generator (DC) Which one converts electrical energy into mechanical energy?

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^(-5) m^2 , and the free electron density in copper is given to be about 10^29 m^(-3) .)

What is the force on a wire if its length (L ) makes an angle 'theta' with the magnetic field (B) when the current passing in the wire is l?

A short bar magnet placed with its axis at 30^@ with an extemal field of 800 G experiences a tunque of 0.016 Nm, (a) What is the magnetic moment of the magnet? (b) What is the work done in moving it from its most stable to most unstable position? (c) The bar magnet is replaced by a solenoid of cros B-sectional area 2 xx 10^(-4) m^(2) and 1000 tums, but of the same magnetic moment. Determine the current flowing through the solenoid.

(A) : In electric circuits, wires carrying currents in opposite directions are often twisted together. (R) : If the wire are not twisted together, the combination of the wires forms a current loop. The magnetic field generated by the loop might affect adjacent circuits or components.

What principles are involved in the given devies , which are available in your home or a shop? a) electrical fan b) battery c) motor pump d) solar pannels e) current generator f) induction stove g) electric heater h) dynamo

Figure 6.20 shows a metal rod PQ resting on the smooth rails AB and positioned between the poles of a permanent magnet. The rails, the rod, and the magnetic field are in three mutual perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0 m Omega . Assume the field to be uniform. (a) Suppose K is open and the rod is moved with a speed of 12 cm s^(-1) in the direction shown. Give the polarity and magnitude of the induced emf. (b) Is there an excess charge built up at the ends of the rods when K is open? What if K is closed? (c) With K open and the rod moving uniformly, there is no net force on the electrons in the rod PQ even though they do experience magnetic force due to the motion of the rod. Explain. (d) What is the retarding force on the rod when K is closed? (e) How much power is required (by an external agent) to keep the rod moving at the same speed (=12 cm s^(-1) ) when K is closed? How much power is required when K is open? (f ) How much power is dissipated as heat in the closed circuit? What is the source of this power? (g) What is the induced emf in the moving rod if the magnetic field is parallel to the rails instead of being perpendicular?

Which of the following is appreciable in the making of a motor? Why? a) A current carrying wire is kept in a uniform magnetic field. b) A current carrying coil is kept in a uniform magnetic field. c) A negative charge is kept in a uniform magnetic field.

VGS PUBLICATION-BRILLIANT-ELECTROMAGNETISM-CREATIVE QUESTION FOR NEW MODEL EXAMINATION (SEC-4)
  1. A coil is hung as shown in the figure.A bar magnet with north pole fac...

    Text Solution

    |

  2. A coil is hung as shown in the figure.A bar magnet with north pole fac...

    Text Solution

    |

  3. Can you apply conservation of energy for electromagnetic induction?

    Text Solution

    |

  4. Explain the working process of induction stove.

    Text Solution

    |

  5. How the tape of a tape recorder reproduces voice?

    Text Solution

    |

  6. Explain different ways to induced current in a coils.

    Text Solution

    |

  7. A charged particle 'q' is moving with a speed 'v' perpendicular to the...

    Text Solution

    |

  8. A circular coil of radius 10 cm, 500 turns and resistance 2 Omega is p...

    Text Solution

    |

  9. Karthik did not understand the word induced emf. Hemanth was explained...

    Text Solution

    |

  10. How can you verify with experiment."The magnetic field lines are close...

    Text Solution

    |

  11. Some devices are given here a) Solenoid b) Bar magnet c) Motor d) ge...

    Text Solution

    |

  12. Some devices are given here a) Solenoid b) Bar magnet c) Motor d) ge...

    Text Solution

    |

  13. Some devices are given here a) Solenoid b) Bar magnet c) Motor d) ge...

    Text Solution

    |

  14. Some devices are given here a) Solenoid b) Bar magnet c) Motor d) ge...

    Text Solution

    |

  15. a) What are the directions of magnetic force on AB,CD,BC and DA ? b)...

    Text Solution

    |

  16. Draw a diagram of field lines due to horse shoe magnet between it pole...

    Text Solution

    |

  17. Draw the magnetic fields formed due to Straight wire carrying curren...

    Text Solution

    |

  18. Draw the magnetic fields formed due to Circular coil carrying curren...

    Text Solution

    |

  19. Draw the magnetic fields formed due to Solenoid carrying current.

    Text Solution

    |

  20. How do you appreciate the role of brushes and slip rings in a motor?

    Text Solution

    |