SSC JE Electrical Engineering 4th March 2017 Shift-2

Consider the circuit given below. What is the power delivered by the 24 V source?

For the circuit shown what is the voltage V if the source voltage is reduced by 50%?

A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubled, the flux density in the core _____.

A cast steel electromagnet has an air gap length of 0.3 cm. Find the ampereturns for the air gap to produce a flux density of 0.7 Wb/m2 in the air gap.

An air gap is usually inserted in magnetic circuits so as to _____.

Which of the following statements is correct?

Consider the following statements:
The force per unit length between two stationary parallel wires carrying (steady) currents _____.
A. is inversely proportional to the separation of wires.
B. is proportional to the magnitude of each current.
C. satisfies Newton's third law.
Out of these _____.

A magnetic circuit requires 800 AT to produce a certain quantity of flux in magnetic circuit. If its excitation coil has 100 turns and 5 ohm resistance, the voltage to be applied in exciting coil is _____.

According to Faraday's law of electromagnetic induction an emf is induced in a conductor whenever it _____.

"In all cases electromagnetic induction, an induced voltage will cause a current to flow in a closed circuit in such a direction that the magnetic field which is caused by that current will oppose the change that produces the current", is the original statement of _____.