No student devices needed. Know more
15 questions
How much power can be generated by a current of 6 amps flowing across a potential difference of 25 volts.?
1.2 watts
0.24 watts
4.2 watts
150 watts
Calculate the amount of current in your fingers if they touch the terminals of a 12V battery when the resistance of your skin is 650 Ω
0.018 amps
54 amps
7800 amps
Can’t be determined from information given
What is the potential difference if a resistance of 25 ohms produces a current of 200A?
2500 volts
20 volts
15 volts
5000 volts
All magnets generate
a north pole
a magnetic field
direction forces
force resistance
Batteries typically have
One positive and one negative terminal
Two negative terminals
Two positive terminals
No terminals
Electric force varies depending on the
Charge and distance between charged objects
Charge and mass of charged objects
Height and mass of charged objects
Mass and distance between charged objects
Positive charges _____________ one another
Attract
Cancel
Repel
join
Electric field lines show the strength and _____________ of an electric field.
Polarization
Friction
Temperature
Direction
The electric field between two objects ___________________ when the distance between them decreases.
Increases
Decreases
Remains constant
None of the above
An electric cell is a source of electric current because of a ______________ between the terminals.
Resistance
Light bulb
Semiconductor
potential difference
Which of the following has the lowest resistance?
Superconductor
Semiconductor
Conductor
insulator
Current is produced when charges are accelerated by an electric field to move to a position of lower
Temperature
Potential energy
Concentration
kinetic energy
Which of the following is not a conductor of electricity?
Salt water
A silver belt buckle
A penny
A candy bar
What is the condition that is necessary for a charge to move in a wire?
difference in temperature
difference in electrical pressure
difference in pressure
nothing is needed, electricity is everywhere
Which type of field is present near a moving electric field?
Only an electric field
Only a magnetic field
Both an electric field and a magnetic field
Neither an electric field nor a magnetic field
Explore all questions with a free account