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SSC JE 2017: Electromagnetic Theory Rankers Quiz 3
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Question 1
The voltage across 5-H inductor is
Find the energy stored at t = 5s. Assume zero initial current.
Find the energy stored at t = 5s. Assume zero initial current.
Question 2
The energy stored in the magnetic field of a solenoid 30cm long and 3cm diameter with 1,000 turns of wire carrying current of 10 A is:
Question 3
Point out the WRONG statement regarding magnetic flux density as per the biot-savert law
Question 4
A magnetic circuit carries a flux ϕi in the iron part and a flux ϕg in the air gap. Then leakage co-efficient is:
Question 5
A wire bent into a semi-circle in the centre and straight at both ends is placed in a uniform magnetic field B pointing out of the page shown in the figure. If the wire carries current I, the force on each straight section xy and zw is ____________.
Question 6
The material used for the magnetic circuit where high value of flux density required is ____________.
Question 7
The relative permeability of paramagnetic material is __________.
Question 8
The magnetic potential difference in a magnetic circuit is given by
Question 9
Following Figure shows a cross-section of a coil. Based on dot and cross notation, which end of the coil is the north pole?
Question 10
A very long solenoid has 800 turns per metre length of the solenoid. A current of 1.6 A flows through it. Then magnetic flux density at the end of the solenoid on its axis is nearly
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Feb 28ESE & GATE EE