# Explain sketch of low frepuance core less induction furnace

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## Related questions

Differentiate between core type and core less induction furnace.

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A ferrite core has less eddy current loss than an iron core because?

In a transformer, low voltage winding is placed near the core in case of concentric windings so as to  1. Reduce the leakage flux 2. Reduce the insulation requirement 3. Reduce the risk of voltage shock in case of insulation breakdown 4. Reduce the core loss   From these, the correct answer is (a) 1, 2, 3 (b) 2, 3, 4 (c) 1, 2, 3, 4 (d) 2, 3

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With neat sketch explain working of Weston type synchroscope.

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At low values of slip, the torque of an induction motor is   (a) directly proportional to the square of the slip. (b) inversely proportional to the square of the slip. (c) directly proportional to the slip. (d) inversely proportional to the slip.

At which time power factor of the induction motor is low?

Generally, Crawling in squirrel cage induction motors is tendency to run stably at speeds as low as (A) One-third of their synchronous speed (B) One-fifth of their synchronous speed (C) One-seventh of their synchronous speed (D) One-ninth of their synchronous speed

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explain the working of single phase induction motor.

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Write the working of L-C-R meter with suitable sketch.

Draw a neat sketch of moving primary fixed secondary double sided LIM. Write one advantage and one disadvantage of it.

Draw a neat sketch of earth fault protection of auxiliary circuit of electric loco. State the function of relay and isolating resistance.

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Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.

The effect of corona is less by using (A) overhead lines of large conductor size (B) under ground cable of small conductor size (C) overhead lines having less spacing between conductors (D) overhead lines of higher voltages

A loss less transmission line having Surge Impedance Loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30%. Then, SIL of the compensated transmission line will be (A) 1835 MW (B) 2280 MW (C) 2725 MW (D) 3257 MW

The input impedance of a short circuited loss less transmission line of characteristic impedance 50 Ohm is

Corona loss is less when the shape of conductor is:

Which type of corona generates much less ozone? A) A positive corona  B) A negative corona C) Both positive corona and negative corona generate same amount of ozone D) No ozone is generated by either type of corona

Materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators, are known as A. Thermistors B. Varistors C. Semi-conductors D. Variable resistors.

If a forward voltage (less than forward breakover voltage) is suddenly applied across anode and cathode of a thyristor, it may result into   (a) Damage to the thyristor (b) Premature triggering of the thyristor because of high dV/dt (c) Reduced holding current of the thyristor (d) All of the above