Ohm's Law

What is the electric current if a circuit has a resistance of 100 Ω and a voltage

of 6.00 V?

• A.

  0.0600 A

• B.

  4.50 A

• C.

  6.00 A

• D.

  12.5 A

What is the voltage of a circuit that has a resistance of 6 kΩ and a current of 2

mA?

• A.

  9 V

• B.

  10 V

• C.

  11 V

• D.

  12 V

What will happen to the current if the voltage is reduced to one half?

• A.

  tripled

• B.

  doubled

• C.

  decreased by one half

• D.

  decreased by one fourth

Calculate the voltage if the current passing through the wire is 3 A, and has a

resistance of 10 Ω.

• A.

  6 V

• B.

  30 V

• C.

  75 V

• D.

  150 V

What is the voltage across a 6 Ω load when 3 A of current passes through it?

• A.

  2V

• B.

  9 V

• C.

  18 V

• D.

  36 V

Which of the following properties of materials does NOT affect resistance?

• A. length

• B. thickness

• C. temperature

• D. strength of the material

Ampere is a unit of what electrical quantity?

• A. current

• B. load

• C. resistance

• D. voltage

What happens to the current across a circuit when the voltage is doubled while

the resistance is held constant?

• A.

  tripled

• B.

  halved

• C.

  doubled

• D.

  remains the same

Which of the following statements is correct about the relationship of voltage

and current?

• A.

  Current varies directly with voltage and resistance is changing.

• B.

  Current varies indirectly with voltage and resistance is changing.

• C.

  Current varies directly with voltage when resistance remains

  constant.

• D.

  Current varies indirectly with voltage when resistance remains

  constant.

What type of conducting wire has the greatest resistance to the flow of current?

• A. thin, long wire

• B. thick, long wire

• C. thin, short wire

• D. thick, short wire