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प्रश्न
State the factors on which the strength of an electromagnet depends. How does it depend on these factors?
Explain the factors on which the strength of an electromagnet depends.
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उत्तर
Strength of an electromagnet depends on the following factors:
- Number of turns in the coil: By increasing the number of turns in the coil, the strength of the electromagnet can be increased.
- Current flowing through the coil: By increasing the flow of current in the coil, the strength of the electromagnet can be increased.
- Length of air gaps between poles: By reducing the length of air gaps between the poles, the strength of the electromagnet can be increased.
संबंधित प्रश्न
State Fleming’s right-hand rule.
What is electromagnetic induction?
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
A. C. generator______.
List some of the practical applications of an electromagnet.
A cylindrical bar magnet (A) and similar unmagnetized cylindrical iron bar (B) are dropped through metallic pipe. The time taken to come down by ____________.
For making a strong electromagnet the material of the core should be ______.
A rectangular, a square, a circular and an elliptical loop, all in the (x - y) plane, are moving out of a uniform magnetic field with a constant velocity `vecv = vhati`. The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for ______.
In the given circuit, initially switch S1 is closed and S2 and S3 are open. After charging of capacitor, at t = 0, S1 is open and S2 and S3 are closed. If the relation between inductance capacitance and resistance is L = 4CR2 then the time (in sec) after which current passing through capacitor and inductor will be same is ______ × 10-4 N. (Given R = ℓn(2)mΩ, L = 2mH)
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 Vis 12 kW, what is the primary voltage?
Which type of force is experienced by a moving charge in a magnetic field?
