Question

Directions : Q 1 to Q6 are multiple choice questions. Each question has 4 choices (1). (2), (3) and (4) out of which ONLY ONE is correct. 1. Which of the following statements is/are incorrect regarding magnetic field lines: (1) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points 2) Magnetic field lines are closed curves (3) If magnetic field lines are parallel and equidistant, they represent zero strength (4) Relative strength of magnetic field is shown by the degree of closeness of the field lines Magnetic field inside a long solenoid carrying current is: (1) Same at all points (2) Minimum in the middle (3) More at the ends than at the centre (4) Found to increase from one end to the other. The magnetic field at a point due to a current carrying conductor is directly proportional to the (1) Current flowing through the conductor (2) Distance from the conductor (3) Voltage across the conductor (4) Resistance of the conductor Two bars of soft iron exactly same are given one of them is a magnet. Without using anything mere, how would you find which one is a magnet hringing two bars near and noting down which one is attracting. The attracting one is a magnet. (2) By bringing two bars near and noting down which one is repelling. One which repells is an ordinary iron (3) By rubbing one bar with the other and noting down which becomes magnet. The bar which is magnetised is an ordinary iron (4) One bar is placed flat horizontal on the table and the other bar is held vertical with its one end on the middle of first bar. If there is attraction between the two, the vertical bar is magnet other is ordinary iron 5. Figure shows a part of an electric circuit. The reading of the ammeter is 3.0 A. Find the currents through the 10-12 and 20-22 resistors. 1092 2092 (1) 1A, 2A (2) 2 A, 1A (3) 10 A, 20 A (4) 20 A, 10 A​

Answer 1

Answer:

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Answer 2

Answer:

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