Unit 15 MCQ from Exercise Time limit: 00:30:00 Quiz-summary 0 of 9 questions completed Questions: 1 2 3 4 5 6 7 8 9 Information Physics 10th Class English Medium Unit 15 You have already completed the quiz before. Hence you can not start it again. Quiz is loading... You must sign in or sign up to start the quiz. You have to finish following quiz, to start this quiz: Results 0 of 9 questions answered correctly Your time: Time has elapsed You have reached 0 of 0 points, (0) Categories Not categorized 0% 1 2 3 4 5 6 7 8 9 Answered Review Question 1 of 9 1. Question The step-up transformer 1. increases the input current 2. increases the input voltage 3. has more turns in the primary 4. has less turns in the secondary coil 5. has less turns in the secondary coil Correct Incorrect Question 2 of 9 2. Question A D.C motor converts 1. electrical energy into mechanical energy 2. mechanical energy into electrical energy 3. mechanical energy into chemical energy 4. electrical energy into chemical energy Correct Incorrect Question 3 of 9 3. Question The turn ratios of a transformer is10. It means 1. Is = 10 Ip 2. Vs = Vp /10 3. Ns = 10 Np 4. Ns = Np /10 Correct Incorrect Question 4 of 9 4. Question If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire 1. decreases 2. will be zero 3. increases 4. remains the same Correct Incorrect Question 5 of 9 5. Question What is the direction of the magnetic field lines inside a bar magnet? 1. from north pole to south pole 2. from side to side 3. there are no magnetic field lines 4. from south pole to north pole Correct Incorrect Question 6 of 9 6. Question Which statement is true about the magnetic poles? 1. like poles attract 2. a single magnetic pole does not exist 3. unlike poles repel 4. magnetic poles do not effect each other Correct Incorrect Question 7 of 9 7. Question Which part of a D.C motor reverses the direction of current through the coil every half-cycle? 1. the brushes 2. the slip rings 3. the commutator 4. the armature Correct Incorrect Question 8 of 9 8. Question The presence of a magnetic field can be detected by a 1. stationary negative charge 2. stationary positive charge 3. magnetic compass 4. small mass Correct Incorrect Question 9 of 9 9. Question The direction of induced e.m.f. in a circuit is in accordance with conservation of 1. energy 2. momentum 3. charge 4. mass Correct Incorrect
