please help me with this questions

QUESTION 21 Here is a bar magnet. The magnetic field made by the bar magnet at one location is shown on the diagram: N X Choose from the following possible directions to answer the questions below: d O out of page g into page h zero magnitude None of the above j Q21 What is the direction (a-j) of the magnetic field of the bar magnet at location 1 (marked with x)? O 1.a O 2.b O 3.c 04.d 0 5.e 06.f 07.g Os.h O 9.i O 10.jQUESTION 22 Here is a bar magnet. The magnetic field made by the bar magnet at one location is shown on the diagram: - X N X Choose from the following possible directions to answer the questions below: O out of page g into page h zero magnitude None of the above i Q22 What is the direction (a-j) of the magnetic field of the bar magnet at location 2 (marked with x)? O 1.a O 2.b O 3.c 04.d 0 5.e 06.f 07.g Os.i O9.h O 10.jm A moving electron travels along the path shown, and passes through a region of magnetic eld There are no other charges present. The magnetic eld is zero everywhere except in the gray region. _e. Choose from the following possible directions to answer the question below: b c +++a into page f t None of the above g G) out of page e } Q23 What is a possible direction (ag) of the magnetic eld in the region where the eld is nonzero? 01.5 02b 03c 04.d 05.9 Oat 0?.9 QUESTION 24 Two identical circular loops of wire, perpendicular to the page, carry the same conventional current I: Perspective view Front view I out of page I out of page O O I P I P I into page I into page Choose from the following possible directions to answer the question below: b O out of page X into page zero magnitude none of the above h Q24 In the front view, what is the direction (a-h) of the magnetic field due to the loops at location P, midway between the loops? O 1.a O2.b O3.c 04.d 0 5.e 06.f 07.g Os.hQUESTION 25 Two wires lie in the plane of the page. Wire 1 carries conventional current to the le, and wire 2 carries conventional current to the right: I1 # # 12 Choose from the following possible directions to answer the question below: b G) out of page 9 into a e f c 4 + a P g + zero magnitude g d none of the above h } Q25 What is the direction (ah) of the magnetic force that wire 1 exerts on wire 2? 01.5 O2.b 03.c O4.d 05.9 O.f 07.9 Oah QUESTION 26 A proton moves with constant velocity v to the right through a region where there is a uniform magnetic field of magnitude B that points into the page. There is also an electric field in this region. The magnetic field and electric field are produced by devices not shown on the diagram. proton B, into page Choose from the following possible directions to answer the question below: b O out of page e X into page f None of the above g Q26 What is the direction (a-g) of the electric field in this region? O1.a O 2.b O 3.c 04.d 0 5.e 06.f 07.gQUESTION 27 A proton moves with constant velocity v to the right through a region where there is a uniform magnetic field of magnitude B that points into the page. There is also an electric field in this region. The magnetic field and electric field are produced by devices not shown on the diagram. proton V X B, into page Choose from the following possible directions to answer the question below: O out of page e into page f None of the above g - Q27 What is the magnitude of the electric field? (a) evB (e) evxB (b) vXB (f) vB/e (c) VB (g) ev (d) B (h) None of the above O1.a O 2.b O3.c 04.d 0 5.e 0 6.f 07.g Os.hQUESTION 28 Here is a long solenoid (coils of wire along a long cylinder), and an end view of the solenoid. Conventional current runs counterclockwise in the solenoid and is increasing with time. Long solenoid Solenoid (end view) perspective View Choose from the following possible directions to answer the questions below: b 6) out of page e + into a e f c 1'- +a P g + zero magnitude g d none of the above In } Q28 What is the direction (a-h) of the electric eld at location 1 (marked with an x)? 01.5 02b 01c 04d 05.9 Oaf 07.9 Oah QUESTION 29 Here is a long solenoid (coils of wire along a long cylinder), and an end view of the solenoid. Conventional current runs counter-clockwise in the solenoid and is increasing with time. Long solenoid, Solenoid (end view) perspective view O I, increasing N Choose from the following possible directions to answer the questions below: b O out of page e into page zero magnitude g none of the above h Q29 What is the direction (a-h) of the electric field at location 2 (marked with an X)? O 1.a O 2.b O 3.c 04.d 0 5.e 06.f 07.g Os.hQUESTION 30 A neutral metal bar is moving at constant velocity v to the right through a region where there is a uniform magnetic field pointing out of the page. The magnetic field is produced by some large coils which are not shown on the diagram. O O O O O V O O B out of page Q30 Which of the following diagrams best describes the state of the metal bar? (a) (b) (c) (d) (e) (f) (g) O1.a O2.b O3.c 04.d 0 5.e 06.f 07.gA variable power supply is connected to a coil and an ammeter, and the time dependence of the ammeter reading is shown. A nearby coil is connected to a voltmeter Ammeter Power Voltmeter reading supply p Ammeter time Q31 Which of the following graphs correctly shows the time dependence of the voltmeter reading? Voltmeter Voltmeter reading reading (a) (b) time time Voltmeter Voltmeter reading reading (C) (d) time time Voltmeter Voltmeter reading reading (e) (f) time time O1.a O 2.b O 3.c O 4.d 0 5.e O 6.f