Punjab 10th Class Physics Chapter 6 Electromagnetism Mcqs Test Online Punjab 10th Class Physics Chapter 6 Electromagnetism Mcqs Test Online 1234567891011121314151617181920Show paginator Hide paginator 5% Question 1 of 20Physics 1. A transformer has 100 turns in the primary and 500 turns in the secondary. If 6 volts is applied across its primary, the voltage induced across its secondary would be: 1.60 volts2.30 volts 3.45 volts 4.0 volts Question 1 of 20Question 2 of 20 2. When a straight current carrying conductor is placed in a magnetic field at right angles to it, the direction of force acting upon it is: 1.Makes an angle of 45° with the current 2.The same as the direction of field 3.Opposite to the direction of the field 4.At right angles to both the field and the currentQuestion 2 of 20Question 3 of 20 3. What is the direction of the magnetic field lines inside a bar magnet? 1.From north pole to south pole 2.There are no magnetic field lines 3.From side to side 4.From south pole to north pole Question 3 of 20Question 4 of 20 4. The shape of magnetic lines of force in case of a straight current carrying conductor is: 1.Triangular 2.Rectangular 3.Elliptical 4.Circular Question 4 of 20Question 5 of 20 5. The D.C, motor converts, electrical energy of battery into ______________ of the coil. 1.Mechanical energy 2.Potential energy 3.Kinetic energy 4.Sound energy Question 5 of 20Question 6 of 20 6. Who discovered electromagnetic induction? 1.Michael Faraday 2.Ohm 3.Maxwell 4.Volta Question 6 of 20Question 7 of 20 7. If a coil moves parallel to magnetic field, the induced e.m.f will be: 1.Maximum 2.Zero 3.Positive4.Negative Question 7 of 20Question 8 of 20 8. A D.C. motor converts: 1.Electrical energy into chemical energy 2.Mechanical energy into chemical energy 3.Electrical energy into mechanical energy 4.Mechanical energy into electrical energy Question 8 of 20Question 9 of 20 9. If curl of fingers of right hand shows the direction of current in solenoid, then thumb indicates: 1.South pole 2.North pole 3.Direction of voltage 4.Flow of current Question 9 of 20Question 10 of 20 10. Which part of a D.C. motor reverses the direction of current through the coil every half-cycle? 1.The commutator 2.The armature 3.The brushes 4.The slip ringsQuestion 10 of 20Question 11 of 20 11. The turn ratio of a transformer is 10. It means: 1.Ns = 10 Np 2.Vx = Vv/103.Ns = Np / 10 4.Is = 10 Ip Question 11 of 20Question 12 of 20 12. Which is not correct according to Fleming’s left hand rule? 1.The forefinger points in the direction of magnetic field 2.The middle finger points in the direction of current 3.The thumb indicates the direction of force 4.The thumb indicates the direction of current Question 12 of 20Question 13 of 20 13. The direction of induced e.m.f. in a circuit is in accordance with conservation of: 1.Charge 2.Mass 3.Momentum 4.Energy Question 13 of 20Question 14 of 20 14. If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire: 1.Remains the same 2.Decreases 3.Increases 4.Will be zero Question 14 of 20Question 15 of 20 15. Select the statement which is not true: 1.Change of flux induces an e.m.f. in the coil 2.The value of induced e.m.f is inversely proportional to the rate of change of flux 3.When there is relative motion between the coil and the magnet, induced e.m.f. is produced 4.Michael Faraday discovered Faraday’s law of electromagnetic induction in 1831 Question 15 of 20Question 16 of 20 16. The presence of a magnetic field can be detected by a: 1.Stationary positive charge 2.Stationary negative charge 3.Magnetic compass 4.Small mass Question 16 of 20Question 17 of 20 17. Which indicates the number of turns in primary coil? 1.Np 2.Ep 3.Es 4.Ns Question 17 of 20Question 18 of 20 18. Which statement is not correct? 1.If a coil is placed in the magnetic field of a bar magnet, some lines of force will pass through its face 2.A solenoid cannot be connected with a galvanometer 3.Magnetic lines of force can be drawn in any magnetic field 4.Battery contains chemical energy in itQuestion 18 of 20Question 19 of 20 19. Which statement is true about the magnetic poles? 1.Unlike poles repel 2.Like poles attract 3.Magnetic poles do not effect each other 4.A single magnetic poles does not exist Question 19 of 20Question 20 of 20 20. The step-up transformer: 1.Has more turns in the primary 2.Increases the input current 3.Increases the input voltage 4.Has less turns in the secondary coil Question 20 of 20 Loading... Test By Subject Punjab Test By Topics 10th Class Physics You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.