ED: Circuits

When light bulbs are connected in series, there are branches at which the current divides.

• true

• false

In a series circuit, the total voltage drop across a series of resistors is the sum of the voltage drops across each individual resistors.

• true

• false

In a parallel circuit, the current is the same everywhere.

• true

• false

When resistors are arranged in parallel, their overall resistance is equal to the sum of the individual resistances.

• true

• false

When a fuse or circuit breaker is used in a circuit, it is usually inserted in parallel.

• true

• false

When two light bulbs are connected in series,

• the same amount of current flows through each light bulb.

• the current through each light bulb is proportional to the resistance of the bulb.

• the light bulbs will not work unless there is a fuse in the circuit.

• there are at least two branches in the circuit.

When one light bulb burns out in a series circuit containing several light bulbs,

• the other light bulbs burn more brightly.

• nothing changes in the rest of the circuit.

• none of the other bulbs will light up.

A 60 ohm light bulb is connected to a 12 V battery. When another 60 ohm bulb is connected in parallel with the first bulb, the current in the circuit

• is halved

• remains the same

• is doubled

When one light bulb burns out in a parallel circuit containing several light bulbs,

• the other light bulbs burn more brightly.

• nothing changes in the rest of the circuit.

• none of the other bulbs will light up.

The symbol used to represent resistance is a schematic drawing is

• two straight lines

• one straight line

• a single line that is broken and has a bend in it.

• a zigzag line