Resistance

Resistance

By Angela Toh

Multiple Choice

How do you measure potential difference in a circuit?

• Voltmeter

• Ammeter

• Thermistor

• Battery pack

Multiple Choice

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

• Negative.....negative

• Negative....positive

• Positive......negative

• Positive....positive

Multiple Choice

In the circuit, the bulb lights up because there is ............... flowing in the closed circuit.

• battery

• current

• resistance

• voltage

Multiple Choice

SI unit of current is

• ampere

• metre

• ohm

• volt

Multiple Choice

SI unit of voltage is

• ampere

• metre

• ohm

• volt

Multiple Choice

Current can be measured using ............

• ammeter

• light bulb

• resistor

• voltmeter

Multiple Choice

Voltage can be measured using ............

• ammeter

• light bulb

• resistor

• voltmeter

Multiple Choice

An ammeter is connected in ...........

• Parallel

• Series

Multiple Choice

A voltmeter is connected in ...........

• Parallel

• Series

Open Ended

In the marble race, what do you think resistance will be?

Multiple Choice

What is Resistance?

• the degree to which a circuit component opposes the passage of an electric current, causing energy dissipation
• How hard the energy is pushed
• The amount of charges that pass by a given point per second
• None of the above

Multiple Choice

Which resistor will prevent the most current flow?

• 1 ohm
• 100 ohms
• 1000 ohms
• 0.5k ohms

Multiple Choice

resistance is

• a force that attracts metal

• a force that allows electricity to pass easily

• a force that opposes the flow of electricity

Multiple Choice

How does resistance affect current?

• less resistance - less current
• more resistance - less current
• more resistance - more current
• resistance does not affect current

Multiple Choice

What is the unit of measurement for resistance?

• Voltage

• Ampere

• Watts

• Ohms

Multiple Choice

What is the unit of resistance

• Ohm

• Home

• Amp

• Camp

Multiple Choice

in which circuit is the lamp brightest

• 1

• 2

• 3

• All the same

Multiple Choice

the formula to find current when the values of V and R are known is

• I = V²R

• I = V/R

• I = R/V

• I=VR

Multiple Choice

How do you calculate resistance?

• Current x Voltage

• Voltage x Power

• Voltage ÷ Current

• Current ÷ Voltage

Fill in the Blank

Example 1: Find R.

Fill in the Blank

Example 2: Find R.

Multiple Choice

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm
• 3 Ohms
• 4 Ohms
• 12 Ohms

Multiple Choice

What is the resistance if the current is 2A and the voltage is 10V?

• 8 Ω

• 20 Ω

• 12 Ω

• 5 Ω

Multiple Choice

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm
• 3 Ohms
• 4 Ohms
• 12 Ohms

Multiple Choice

How do you calculate current from voltage and resistance?

• Current = voltage x resistance

• Current = resistance x power

• Current = voltage ÷ resistance

• Current = resistance ÷ voltage