9.40_q1) which particle moves through a metal wire as electricity?

question 1 options:

protons

neutrons

electrons

atoms

(9.40_q2) electrons move

question 2 options:

thru the circuit from the negative power terminal to the positive power terminal

thru the circuit from the positive power terminal to the negative power terminal

(9.40_q3) the flow of electrons is called and is symbolized as i

question 3 options:

voltage

current

resistance

ohm

(9.40_q4) the "force" causing electricity to flow is called

question 4 options:

voltage

current

resistance

ohms

(9.40_q5) the "force" opposing the flow of electricity is called

question 5 options:

voltage

current

resistance

amps

(9.40_q6) the current is measured in units of

question 6 options:

volts

ohms

amps

henrys

(9.40_q7) the voltage is measured in units of

question 7 options:

volts

amps

ohms

henrys

(9.40_q8) the resistance to the flow of electricity is measured in units of .

question 8 options:

volts

amps

ohms

henrys

(9.40_q9) when electricity goes through an electrical component it encounters a resistance to its flow. what happens to the voltage of the electricity as it goes through the component?

question 9 options:

the voltage is increased because of the electrical resistance.

the voltage is unchanged by the electrical resistance.

the voltage is decreased by the electrical resistance.

(9.40_q10) what happens if an led is installed backward in a circuit

question 10 options:

it works, but it glows with the wrong color.

it works and glows so brightly it can hurt your eyes.

it doesn't work. the electricity can't go backwards thru an led.

Answer No 1:

The correct option is Electrons.

Electrons are the negatively charged particles of an atom. They revolve around the nucleus of an atom. In circuits, electricity is carried by the electrons which move through a wire. Hence, option C is the correct option.

Other options like option A are not correct because protons are the positively charged particles of an atom. They are present in the nucleus of an atom and hence, do not generate an electric current.

Answer No 2:

Electrons move through the circuit from the negative power terminal to the positive power terminal.

Electrons make up the negative charged particles of an atom. They are involved in the conduction of electricity in circuits. In a circuit, the current flows from a negatively powered terminal to a positively charged terminal. This is known as the electron flow. Hence, option A is correct.

Answer No 3:

The correct option is B) Current

The movement or flow of electrons or electric charge is termed as electric current.  Whenever a circuit is completed, current is generated.

Other options like option C, resistance are not correct because resistance is the force which opposes current flow.

Answer No 4:

The correct option is A) Voltage

Voltage can be described as the force which causes electricity to flow in a circuit. Hence, option A is correct.

Other options like option C are jot correct because resistance is the force which opposes the flow of current.

Answer No 5:

The correct option is C) resistance

Resistance can be described as the force which opposes the flow of current. Resistance can be measured in ohms. It can be described as the difficulty which electrons have in moving through a circuit.

Other option like option A is not correct because voltage is the force through which current is generated.

Answer No 6:

The correct option is C amps

The S.I unit through which current is measured is called amperes. The symbol for amperes is A.  Hence, option C is the correct option.

Other options like ohms are not correct because ohms is the S.i unit for resistance.

Answer No 7:

The correct option is A) volts

The S.I unit for voltage is volts. Voltage can be described as the potential difference which is present in a circuit. Hence, option A is correct.

Other options are not correct because amp is the unit of electric current and ohms is the unit for resistance.

Answer no 8:

The correct option is C) ohms

In physics, resistance can be described as the force which opposes the motion of electrons or electrical current. The S.I unit for resistance is ohms. Hence, option C is correct.

Other options like option A is not correct because volts is the S.I unit of velocity. Option B is not correct because amps is the unit for electric current.    

Answer No 9:

The correct option is C) The voltage is decreased because of the electrical resistance.

According to ohm's law electric current is directly proportional to electric current and inversely proportional to electric resistance.

So, when the resistance increases, the voltage decreases.

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