Chapter 23

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The current through a 10-ohm resistor connected to a 120-V power supply is

12 A

The electric power of a lamp that carries 2 A at 120 V is

240 Watts

When a 10-V battery is connected to a resistor, the current in the resistor is 2 A. What is the resistor's value?

5 Ohms

A coulomb of charge that passes through a 6-volt battery is given

6 Joules

Which statement is correct?

Charge flows in a closed circuit

A 10-ohm resistor has a 5-A current in it. What is the voltage across the resistor?

More than 20 V

In an electric circuit, the safety fuse is connected to the circuit in

Series

Electrons are made to flow in a wire when there is

a potential difference across its ends

An ampere is a unit of electrical

current

Alternating current is normally produced by a

generator

Stretch a copper wire so that it is thinner and the resistance between its ends

increases

When two lamps are connected in parallel to a battery, the electrical resistance that the battery senses is

less than the resistance of either lamp

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is

more than the resistance of either lamp


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