Current Electricity - Ohm's Law and Kirchhoff's Rules

What quantity describes the rate of flow of charges or the total amount of charges moving past a point in a conductor?

• Voltage

• Electric Current

• Electric Resistance

• Electrical Power

Also known as 'electric potential difference', what quantity describes electrical potential energy per coulomb of charge in a circuit?

• Voltage

• Electric Current

• Electric Resistance

• Electrical Power

What quantity describes the opposition to the flow of electrons in an electrical circuit?

• Voltage

• Electric Current

• Electric Resistance

• Electrical Power

Which quantity describes the measure of the rate of delivery of electrical energy, or the rate of work done by an electrical component?

• Voltage

• Electric Current

• Electric Resistance

• Electrical Power

Shown is the symbol of a battery used in constructing circuit diagrams. Which end is the 'positive' terminal?

• A

• B

Tags

NGSS.HS-PS2-5

Suppose that a $1.5\ V$  power supply is used in a circuit with a lone $25\ \Omega$  resistor. What would be the magnitude of the electric current flowing in this circuit?

•  $37.5\ A$  

•  $26.5\ A$  

•  $16.67\ A$ 

•  $0.06\ A$ 

Suppose that a $1.5\ V$  power supply is used in a circuit with a lone $25\ \Omega$  resistor. What would be the magnitude of the electrical power dissipated by the resistor in this circuit?

•  $0.09\ W$  

•  $16.67\ W$  

•  $37.50\ W$ 

•  $56.25\ W$  

Three resistors, $R_A=10\ \Omega$  , $R_B\ =20\ \Omega$  , and  $R_C\ =\ 25\ \Omega$  , are connected in SERIES. The total resistance of this setup is equal to _____.

•  $0.19\ \Omega$  

•  $5.26\ \Omega$  

•  $18.33\ \Omega$  

•  $55\ \Omega$  

Three resistors, $R_A=10\ \Omega$  , $R_B\ =20\ \Omega$  , and  $R_C\ =\ 25\ \Omega$  , are connected in PARALLEL. The total resistance of this setup is equal to _____.

•  $0.19\ \Omega$  

•  $5.26\ \Omega$  

•  $18.33\ \Omega$  

•  $55\ \Omega$  

Two resistors, $R_1$  and $R_2\$  are connected in SERIES. If $R_2\ >\ R_1$  , which among the statements is TRUE about the electric currents that passes thru each resistor?

•  $I_1\ >\ I_2$ 
  

•  $I_1=I_2$  

•  $I_1<I_2$