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# Electronics Engineering

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2021-10-29 18:35:46
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Cards in this guide (28)
What unit is used to measure resistance

ohm

What unit is used to measure current

In a wire . . . . . ampere

In a river . . . . . mile per hour

More detail for the electrical answer

The ampere, often abbreviated to amp or A.

The unit is named after the French physicist André Marie Ampère.

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A current of 1A is equal to 1 coulomb of charge passing a point in 1 second.

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The ampere is the unit of current. It is approximately 6.24 × 1018 electrons passing a given point each second. See the Related Link shown below for more detail.

Two resistors are connected in series to a 9 volt battery The larger resistor provides twice as many ohms resistance as the smaller one The current through the circuit is 3 amps What is the resista

2

A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source What is the current running through the 60 ohm resistor

2.0 or two

A step-up transformer has 300 turns on its primary coil and 90000 turns on its secondary coil If the current flowing through the secondary is 5 amps What is the current flowing in the primary

150 amperes

A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source What is the current through the 75 ohm lamp

2 amps

A string of 15 Christmas tree lights is connected in series to a 90 volt power source What is the value of the resistance of each light if the current flowing through the circuit is 2 amps

3
3 ohms

A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source What is the current running through the entire circuit

6

A ray of light strikes a flat surface of water The angle that the incoming light ray makes with the normal is called the angle of

incident

Why does quartz resist chemical weathering more than any other common material

because of its hardness

The apparent change in the frequency of a sound emitted by a moving object as it passes a stationary observer is called the what effect

Doppler effect.

A transformer has 150 turns on the primary coil and is connected to a 120 volt power source How many turns will be needed on the secondary coil to provide a secondary voltage of 600 volts

600 volts is five times the 120 volt primary, so the secondary winding must have 750 turns, which is five times as many turns as the 150 turns of the primary winding.

Three 15 ohm resistors are connected in parallel to a 30 volt battery What is the equivalent resistance through the circuit

5 ohms...

What is the incoming voltage from the current source to the transformer called

the incoming voltage from the current source to the transformer is called primary voltage.....

A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source what is the total resistance of the lamp and the heater

50 ohms...!

A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source What is the total current through the circuit

3 amps

Which of these two regular polygons has the larger interior angle triangle or heptagon

heptagon

A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source What is the current running through the 40 ohm resistor

3 amps

The voltage that is provided by the transformer is called the what voltage

Secondary voltage.

A string of 20 Christmas tree lights are connected in series to a 20 volt power source The bulbs each have a resistance of .5 ohm How much current is flowing through the circuit

2 amps. If it is D.C.

Five resistors are connected together in series One resistor is 2 ohms one is 3 ohms one is 4 ohms one is 5 ohms and the fifth is 6 ohms What is the total resistance

A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source What is the current running through the 120 ohm resistor

1amp

A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi

250 newtons

A 5 ohm resistor a 20 ohm resistor and a 25 ohm resistor are all connected in series to a 100 volt power source What is the current running through the circuit

2 amps. 100 volts divided by 50 ohms = 2 amps. E/R=I.

A 5 ohm resistor a 10 ohm resistor and a 15 ohm resistor are connected in a series to a 120 volt power source what is the amount of current flowing between the 5 ohm resistor and the 10 ohm resistor

The current would be about 20 volts.

This figure is a regular 12-sided polygon Find m 3

9

What is the total current flowing through a 45 ohm resistor 1.4 amps and 20 ohm resistor 1.8 amps

Just add the amps (3.2 amps).

What voltage is applied to a 4 ohm resistor if the current is 1.3 amps

5.2

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