quiz 1

1.     What happens to the current in a circuit if the resistance is increased while keeping the voltage constant?

• INCREASES

• DECREASES

• REMAINS CONSTANT

• BECOMES ZERO

2.      Which direction do conventional current flow in an electric circuit?

• from positive to negative

• from negative to positive

• depends on the material

• both from positive to negative and from negative to positive

3.       Which of the following device is commonly used to provide a source of electromotive force in electrical circuits?

• resistor

• capacitor

• battery

• diode

4.       Which of the following factors affects the resistivity of a material?

• cross sectional area

• length

• temperature

• all of the above

5       What is resistance in an electrical circuit?

• A.     The ability of a material to conduct electricity.

• B.      The potential difference between two points in a circuit

• C.      The opposition to the flow of electric current

• D. The ability of a material to store electric energy

6.       According to the Ohm’s law , what is the relationship between voltage(V), current(I), and resistance (R)?

• A.      V=IR

• B.      V=I/R

• C.      V=R/I

• D.      V=I+R

7.In a series-parallel circuit, how does the voltage drop across resistors compare within the series sections?

• It is the same across each resistor in series

• It varies depending on the resistance of each resistor in series

• It is inversely proportional to the resistance of each resistor in series

• It is directly proportional to the resistance of each resistor in series

8.The total resistance Rtotal in a parallel circuit is equal to:

• The sum of the individual resistances

• The average of the individual resistances

• The reciprocal of the sum of the reciprocals of the individual resistances

• The product of the individual resistances

   

9.       What is a resistor?

• A device that generates electricity

•   A device that regulates current flow and reduces voltage

• A device that stores electrical energy

• A device that increases current flow in a circuit

10.Peter wants to measure an unknown voltage in his new apartment using a multimeter. Which of the following is the safest thing to do?

• He must set the switch to the lowest possible range.

• He must set the switch to the “Ω” range.

• He just needs to put two metals inside the female plug and touch them.

• He must set the switch to the highest possible range.