Electrical Resistance
a year ago
stevenejones
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• Question 1
30 seconds
Q.

What are the units for electrical resistance?

ohms

joules

volts

amps

• Question 2
30 seconds
Q.

In a wire, _________________ flow from negative to positive

metal atoms

resistors

electrons

ohms

• Question 3
30 seconds
Q.

A 25 ohm resistor is connected in series with a 15 ohm resistor. What is the total resistance?

10 ohms

375 ohms

40 ohms

9.4 ohms

• Question 4
30 seconds
Q.

A 25 ohm resistor is connected in parallel with a 15 ohm resistor. What is the total resistance?

80 ohms

375 ohms

40 ohms

9.4 ohms

• Question 5
30 seconds
Q.

Substances with high resistivity such as plastics and ceramics.

conductors

insulators

semiconductors

fixed resistors

• Question 6
30 seconds
Q.

The resistance of a piece of wire does not depend on _________________.

wire material

wire mass

wire length

wire cross sectional area

• Question 7
30 seconds
Q.

Ohm's law is ________________

R = V X I

V= I X R

I = R X V

V = I / R

• Question 8
30 seconds
Q.

The voltage is 5 Volts. The Resistance is 25 ohms. What is the current?

5 A

0.2 A

20 A

125 A

• Question 9
30 seconds
Q.

If the resistance remains the same in a circuit but the current increases, what happened to the voltage?

increases

decreases

remains the same

unknown

• Question 10
30 seconds
Q.

If the voltage remains the same in a circuit but the resistance increases, what happens to the current?

increases

decreases

remains the same

unknown

• Question 11
30 seconds
Q.

If the length of a wire increases, the resistance ____________

decreases

increases

stays the same

unknown

• Question 12
30 seconds
Q.

If the cross sectional area of a wire decreases, the resistance in the wire will ____________

decreases

increases

stays the same

unknown

• Question 13
30 seconds
Q.

The current is 10 amps. The resistance is 5 ohms. What is the voltage?

2 V

5 V

50 V

10 V

• Question 14
60 seconds
Q. ____________ allows electricity to flow.
A conductor
An insulator
A magnet
• Question 15
60 seconds
Q. the tendency for a material to oppose the flow of electrons
current
circuit
resistance
difference
• Question 16
45 seconds
Q. The mathematical relationship between Voltage, Current, and Resistance:
Tesla's Law
Edison's Law
Ohm's Law
• Question 17
30 seconds
Q.

Which of the following is NOT a conductor?

Wood

Wire

Metal

Copper

• Question 18
60 seconds
Q. The current passing through bulbs in series will be...
...the same
...different
• Question 19
120 seconds
Q. If we have several light bulbs connected to a battery in parallel...
The voltage will be the same across each bulb
the current will be the same across each bulb
The current will be the same through each bulb
The resistance will be the same across each bulb
• Question 20
30 seconds
Q. Choose the material that is an insulator.