Railway Electrification System Quiz 1

When electrons can move easily from atom to atom in a material, the material is a ________.

• Conductor

• Insulator

• Semiconductor

• None of the above

When the two bodies have an equal amount of charge with the same polarity, they ______ each other.

• attract

• attract then repel

• repel

• repel then attract

Which of the following materials is a good conductor of electricity?

• Wood

• Copper

• Glass

• Rubber

The measure of  the electric pressure that causes a current to flow is called _______.

• Voltage

• Current

• Resistance

• Electric Power

It is the work done in one second by one volt of potential difference in moving one coulomb of charge.

• Voltage

• Current

• Resistance

• Electric Power

A ________ has zero R, which causes excessively high I in the short-circuit path because of no resistance.

• Closed Circuit

• Short Circuit

• Open Circuit

• Series Circuit

Voltages are connected _________ when the plus terminal of one is connected to the negative terminal of the next. They can be added for a total equivalent voltage.

• Series-aiding

• Series-opposing

• Series-parallel Circuit

• None of the above

This type of cell can be recharged because the chemical action is reversible.

• Primary Cell

• Secondary Cell

• Dry Cell

• Wet Cell

_________ voltage that continuously varies in amplitude and periodically reverses in polarity. One cycle includes two alternations in polarity.

• Alternating Current

• Direct Current

• Frequency

• All of the above

The electric or magnetic effect of one body on another without any physical contact between them is called ________.

• Induction

• Attraction

• Mutual Induction

• Mutual Attraction