Lab 2 Flashcards
(40 cards)
What happens to the charge on the Ice Pail when a positively charged disk is lowered into the pail without touching the inner wire mesh cylinder?
Becomes positively charged
Becomes negatively charged
Becomes neutrally charged
Charge remains same
Charges remains same
An initially uncharged metal sphere is charged by using a negatively charged rod through ____ process, if the charge accumulated on the sphere is positive.
Charge by rubbing
Charge by contact
Conduction
Induction
Induction
The magnitude of electric force between two point charges is ______ the square of the distance between them.
Directly proportional to
Inversely proportional to
Equal to
double
Inversely proportional to
If charges are shared by two unequally sized spheres, which one will have the lesser charge when equilibrium is reached?
The larger sphere
The smaller sphere
Both have same charges
The smaller sphere
The Faraday Ice Pail is momentarily grounded while a negatively charged disk is still inside the inner wire mesh cylinder. What happens to the charge on the Ice Pail when the charged disk is removed?
Becomes positively charged
Becomes negatively charged
Becomes neutrally charged
Charge remains same
Becomes positively charged
An initially uncharged metal sphere is charged by using a positively charged rod through ___ process, if the charge accumulated on the sphere is positive.
Conduction
Induction
Both A and B
None of the above
Conduction
There are two copper spheres, each hanging from an insulating nylon thread. One of the spheres has a net negative charge, while other sphere has neutral charge. If the spheres are close together but do not touch, they will _____.
Attract each other
Repel each other
Exert no force on each other
Attract each other
Two charges placed 1m apart from each other exert a 1N force on each other. If the charges are pulled to 2 meters apart, the force on each charge will be
0.25 N
0.5 N
2N
4N
0.25 N
A system as a whole is neutral because the total charge is ___.
Constant
Positive
Negative
Zero
Zero
What happens to the charge on the Ice Pail when the Ice Pail is momentarily grounded while a negatively charged disk is still inside the inner wire mesh cylinder?
Becomes positively charged
Becomes negatively charged
Becomes neutrally charged
Charge remains same
Becomes neutrally charged
Coulomb’s law says that the force between any two charges depends
Directly on the size of the charges
Inversely on the square of the distance between the charges
Both A and B
None of the above
Both A and B
An initially uncharged metal sphere is charged by using a negatively charged rod through ___ process, if the charge accumulated on the sphere is negative.
Conduction
Induction
Both A and B
None of the above
Conduction
There are two copper spheres, each hanging from an insulating nylon thread. One of the spheres has a net positive charge, while other sphere has neutral charge. You allow the spheres to touch. After they touch, the two spheres will ____.
Attract each other
Repel each other
Exert no force on each other
Repel each other
What happens to the charge on the Ice Pail after the positively charged disk is lowered into the pail without touching the inner wire mesh and removed from the inner pail?
Becomes positively charged
Becomes negatively charged
Becomes neutrally charged
Charge remains same
Charge remains same
The force between two point charges F is given by F = k q1q2/r2, where k = 9x109 Nm2/C2. If q1=q2=10-9 C is separated by 1 cm, what is the magnitude of force exerted on q2 by q1?
9x10-9 N
9x10-5 N
9x104 N
9 N
9x10-5 N
A positive charge is brought very close but not touching to an uncharged conductor which is insulated from the ground. The conductor is then grounded while the charge is kept close. After removing the nearby charge, the ground connection from the conductor is disconnected. The conductor now has
A net negative charge
A net positive charge
No net charge
None of the above
No net charge
An electrometer connected between the inner pail and the shield will detect ____.
Current
Charge
Resistance
Potential difference
Potential difference
Two unlike charges ______
Must be neutrons
Neutralize each other
Repel each other
Attract each other
Attract each other
The electric field inside a conductor in electrostatic equilibrium is
Constant
Zero
Positive
Negative
Zero
The Faraday Ice Pail works on the principle that any charge placed inside a conducting surface will induce _____ on the outside of the surface
A positive charge
A negative charge
An equal charge
An unlike charge
An equal charge
The unit of electric field produced by a point charge is
Amperes
Newtons/Coulombs
Newtons
joules
Newtons/Coulombs
What happens to the charge on the Ice Pail when you rub the inner pail with a positively charged disk and then remove the charged disk?
Becomes positively charged
Becomes negatively charged
Becomes neutrally charged
Charge remains same
Becomes positively charged
A car is struck by lightning. The resulting electric field inside the car is
Zero
Small enough to be safe for a person inside
Large, but for a short period of time
Large for a longer period of time
Zero
Two charges are arranged such that there is a 36 N repulsive force between them. What would be the new force if the charge on one of the two charges was doubled?
18 N
36 N
72 N
144 N
72 N
