PHYS 1260 EXAM 2 QUESTIONS AND VERIFIED
ANSWERS
When two lamps are connected in series to a battery, the electrical resistance that the
battery "senses" is - Answers - More than the resistance of either lamp
When two lamps are connected in parallel to a battery, the electrical resistance that the
battery "senses" is - Answers - Less than the resistance of either lamp
When two identical lamps in a circuit are connected in parallel, the total resistance is -
Answers - less than the resistance of either lamp.
Consider a lamp powered by a battery. Charge flows - Answers - through both the
battery and the lamp
The direction of the force exerted on a moving charge in a magnetic field is - Answers -
at right angles to the direction of the motion
The force on an electron moving in a magnetic field will be least when its direction is -
Answers - the same as the magnetic field direction
A beam of singly-charged ions entering a magnetic field are swept into circular paths.
The wider paths are those of - Answers - the heavier ions
When current reverses direction in a wire, the surrounding magnetic field - Answers -
also reverses direction
A weak and strong magnet repel each other. The greater repelling force is by the -
Answers - both the same
The source of all magnetism is - Answers - Both or either A and B
A. Electrons rotating around an atomic nucleus
B. Electrons spinning around internal axis
Where magnetic field lines are more dense, the field there is - Answers - stronger
An electromagnet can be made stronger by: - Answers - Both A and B
A. Increasing the number of turns of wire
B. Increasing the current in the coil
The reason that an electron moving in a magnetic field doesn't pick up speed is -
Answers - The magnetic force is always perpendicular to its motion.
ANSWERS
When two lamps are connected in series to a battery, the electrical resistance that the
battery "senses" is - Answers - More than the resistance of either lamp
When two lamps are connected in parallel to a battery, the electrical resistance that the
battery "senses" is - Answers - Less than the resistance of either lamp
When two identical lamps in a circuit are connected in parallel, the total resistance is -
Answers - less than the resistance of either lamp.
Consider a lamp powered by a battery. Charge flows - Answers - through both the
battery and the lamp
The direction of the force exerted on a moving charge in a magnetic field is - Answers -
at right angles to the direction of the motion
The force on an electron moving in a magnetic field will be least when its direction is -
Answers - the same as the magnetic field direction
A beam of singly-charged ions entering a magnetic field are swept into circular paths.
The wider paths are those of - Answers - the heavier ions
When current reverses direction in a wire, the surrounding magnetic field - Answers -
also reverses direction
A weak and strong magnet repel each other. The greater repelling force is by the -
Answers - both the same
The source of all magnetism is - Answers - Both or either A and B
A. Electrons rotating around an atomic nucleus
B. Electrons spinning around internal axis
Where magnetic field lines are more dense, the field there is - Answers - stronger
An electromagnet can be made stronger by: - Answers - Both A and B
A. Increasing the number of turns of wire
B. Increasing the current in the coil
The reason that an electron moving in a magnetic field doesn't pick up speed is -
Answers - The magnetic force is always perpendicular to its motion.
