Question 3 1 pts Check all the true statements O Magnetic field lines indicate the local direction of the magnetic force on a positive test charge O Magnetic field lines outside a permanent magnet point away from its North magnetic poles and point toward its South magnetic pole O Magnetic field lines are always closed loops and do not have endpoints O A long straight wire carrying a current produces magnetic field lines that circulate around the wire O The magnetic field inside a permanent magnet is zeroQuestion 5 1 pts Check all the correct statements [:I By combining uniform electric elds and uniform magnetic elds. it is possible to build an apparatus that can select particles travelling with a selected velocity [:1 it is possibie to produce a beam of electrons with a known kinetic energy using a heated wire and positive electrodes at known voltages [:l Knowing the velocity of an electron beam and the energy of the electrons. it is possible to determine the electron mass [:1 Knowing the velocity of an electron beam and the energy of the electrons. it is possible to determine the electron charge C] Knowing the velocity of an electron beam and the energy of the electrons. it is possible to determine the ratio of the electron mass to the electron charge Question 1 1 pts Check all the true statements [:1 That electric currents affect compass needles was discovered by Danish physicist Hans Christian Anderson C] it is possible to cut a permanent magnet into a North pole and a South pole [:1 The N end of a compass needle is attracted to the 5 end of another compass needle E] Near the geographic north pole of Earth. the N end of a compass needle tries to point upwards \fQuestion 4 1 pts A positively charged particle is moving in a uniform magnetic field, with no other forces present. Check all the true statements. O The magnitude of the particle velocity is always constant O The particle always travels on a parabolic path O The particle aways travels on an elliptical path O The particle always travels on a circular path or a straight line The particle always travels on a helical path or a straight lineQuestion 2 1 pts A particle with a positive electric charge is in a uniform magnetic field. Check all the true statements. O The particle always feels a force in the direction of the magnetic field O The particle always feels a force at right angles to the magnetic field O The particle always feels a force at right angles to its velocity O If the particle is moving opposite to the magnetic field, it feels zero force O Reversing the particle charge reverses the force O Reversing the magnetic field reverses the force O Reversing the particle velocity reverses the force