# IIT JEE Questions And Answers :: Electromagnetic Induction Electromagnetic Waves: part1

IIT JEE : Electromagnetic Induction Electromagnetic Waves QUESTIONS AND ANSWERS :: part1 : 1 to 5

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2014 examinations :

 1.The electromagnetic waves of much short wavelength (25 mm to 5 mm) were produced and observed by: Maxwell Hertz Marconi J.C. Bose ANSWER : : J.C. Bose
 2.A transformer has an efficiency of 80% and works at 100 V and 4 kW. If the secondary voltage is 240 V, then the value of primary current is: 28.5 A 40 A 20 A 80 A ANSWER : : 40 A
 3.Electromagnetic waves are transverse in nature is evident by: polarization interference reflection diffraction ANSWER : : polarization
 4.A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then: a current will be induced in the coil no current will be induced in the coil an emf and a current both will be induced in the coil none of the above ANSWER : : no current will be induced in the coil
 5.An inductance has a high resistance to AC and low to DC. When a DC voltage source having same AC component superimposed on it sends current through an inductance to a load resistance: the DC voltage falls appreciably across the AC component falls only a small amount the AC and DC voltages fall by the same small percentage the AC voltage falls appreciably across the load and DC voltage falls by only a small amount both AC and DC voltage fall to nearly zero ANSWER : : the DC voltage falls appreciably across the AC component falls only a small amount

More Electromagnetic Induction Electromagnetic Waves QUESTIONS AND ANSWERS available in next pages

Health is the greatest gift, contentment is the greatest wealth -Buddha
The only place where success comes before work is in the dictionary.- Vidal Sassoon