Voltage and Current

A 12 volts battery is used to generate electricity of three identical light bulbs, it is connected in a simple circuit and labelled as shown. What is the voltage accross the node A-B?

• 0

• 12 V

• 6 V

• 3 V

A 12 volts battery is used to generate electricity of three identical light bulbs, it is connected in a simple circuit and labelled as shown. The voltage is zero at node . . .

• B-C, D-E and F-G

• A-B, C-D, E-F and G-H

• A-B, B-C, C-D and D-E

• all nodes will be valued zero

If the three bulbs are identical. The voltage accross the node D-E will be equal to . . .

• 12 V

• 6 V

• 4 V

• 0

The electric potential energy is transformed into useful form at the node . . .

• A-B, C-D, E-F and G-H

• H-A only

• B-C, D-E and F-G

• AB and G-H

Which one of the nodes where the electric potential energy is not used to do work?

• A-B, C-D, E-F and GH

• H-A

• B-C, D-E andF-G

• B-G

The voltage of a dry cell is 1.5 V. What is the energy provided by dry cell to drive 0.5 C of charge around a circuit?

• 7.5 V

• 30 V

• 2 V

• 1 V

If 30 C of electric charge flows past a point in a wire in two minutes, what is the current in the wire?

• 60 A

• 15 A

• 0.25 A

• 0.75 A