Exam 7: Electricity

You have a parallel circuit in a house that operates on 120 V with several outlets for plugging in appliances and it has a 20 A fuse in the circuit.What is the maximum number of 600-W appliances that can be plugged into the outlets without "blowing" the fuse? Assume that if the current flow exceeds the rating of the fuse,it will blow.

If the length of a wire increases,its resistance decreases.

​Match each item with the correct statement below. -the energy per unit charge supplied by a battery

An electric motor on an airplane operates on 24 volts and draws a current of 15 amperes. (a)What is the power consumption of the motor? (b)How much energy does the motor use during a 2 hour flight?

The current drawn by the heater is __________.

The size of the current flowing through a conductor equals the __________ divided by the conductor's ___________.

A battery stores electric charge in the same way that a bottle stores water.

The electric field shown is produced by a single point charge at the center of the picture. -If a new negative point charge is placed at location B directly above the one pictured,the force on it will

If I short out a D cell and draw a current of 7 A for 5 s,how many coulombs of charge move through the circuit?

An atom with fewer electrons than protons is

An atom with fewer electrons than protons is a __________.

A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts. -If two slide projectors are connected in parallel across the same 120-volt source,the current drawn from the source in amperes is

If two heaters are connected in parallel across the 120-volt source,the current drawn from the source is __________.

​Match each item with the correct statement below. -type of current supplied by a battery

Why do you hear thunder a substantial time after seeing a lightning flash?