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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Write Fleming’s right hand thumb rule with the help of diagram.

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प्रश्न

Write Fleming’s right hand thumb rule with the help of diagram.

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उत्तर

If a current-carrying straight conductor is held in our right hand such that the thumb points towards the direction of the current, then the curled fingers around the conductor will give the direction of the magnetic field.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Effects of electric current - Answer in one sentence.

संबंधित प्रश्‍न

The magnetic flux through a loop varies according to the relation Φ = 8t2 + 6t + C, where ‘C’ is constant, 'Φ' is in milliweber and 't' is in second. What is the magnitude of induced e.m.f. in the loop at t = 2 seconds.


The device used for producing electric current is called _________.


A metal rod `1/sqrtpi `m long rotates about one of its ends perpendicular to a plane whose magnetic induction is 4 x 10-3 T. Calculate the number of revolutions made by the rod per second if the e.m.f. induced between the ends of the rod is 16 mV.


A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s−1, at right angles to the horizontal component of the earth’s magnetic field, 0.30 × 10−4 Wb m−2.

  1. What is the instantaneous value of the emf induced in the wire?
  2. What is the direction of the emf?
  3. Which end of the wire is at the higher electrical potential?

When an electric current is passed through any wire, a magnetic field is produced around it. Then why an electric iron connecting cable does not attract nearby iron objects when electric  current switched on through it?


State three ways in which the strength of an electromagnet can be increased.


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 Name two devices in which electromagnets are used and two devices where permanent magnets are used.


What condition is necessary for the production of current by electromagnetic induction?


When a wire is moved up and down in a magnetic field, a current is induced in the wire. What is this phenomenon known as?


An induced current is produced when a magnet is moved into a coil. The magnitude of induced current does not depend on:  

(a) the speed with which the magnet is moved
(b) the number of turns of the coil
(c) the resistivity of the wire of the coil
(d) the strength of the magnet


In which of the following case does the electromagnetic induction occur?

A loop of wire is held near a magnet.


Electromagnetic induction means ______.


Consider the energy density in a solenoid at its centre and that near its ends. Which of the two is greater?


Calculate the dimensions of (a) \[\int \overrightarrow{E} . d \overrightarrow{l,}\] (b) vBl and (c) \[\frac{d \Phi_B}{dt}.\] The symbols have their usual meaning.


Can you find the magnitude of current using Fleming's right hand rule?

 Can a transformer work when it is connected to a D.C. source? Give a reason.


The diagram 10 shows two coils X and Y. The coil X is connected to a battery S and a key K. The coil Y is connected to a galvanometer G.

When the key K is closed. State the polarity
(i)At the end of the coil X,
(ii)At the end C of the coil Y,
(iii)At the end C of the coil Y if the coil Y is (a) Moved towards the coil X, (b) Moved away from the coil X.


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A. C. generator______.


Complete the following diagram of a transformer and name the parts labeled A and B. Name the part you have drawn to complete the diagram . What is the material of this part? In this transformer a step-up or step-down? Why?


State Fleming’s Right Hand Rule.


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Which of the following scientist invented the rule of electromagnetic induction?


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A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then ____________.


What should be the core of an electromagnet?


Ansari Sir was demonstrating an experiment in his class with the setup as shown in the figure below.

A magnet is attached to a spring. The magnet can go in and out of the stationary coil. He lifted the Magnet and released it to make it oscillate through the coil.
Based on your understanding of the phenomenon, answer the following question.

What is the principle which Ansari Sir is trying to demonstrate?


If the sun radiates energy at the rate of 3.6 × 1033 ergs/sec the rate at which the sun is loosing mass is given by ______.


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A conductor of length 50 cm carrying a current of 5 A is placed perpendicular to a magnetic field of induction 2×10 -3T. Find the force on the conductor.


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A current I = 10 sin(100π t) A is passed in first coil, which induces a maximum e.m.f of 5π volt in second coil. The mutual inductance between the coils is ______.


Which type of force is experienced by a moving charge in a magnetic field?


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