INTRO ELECTRIC CIRCUIT

What is the unit of voltage?

• Ampere (A)

• Ohm (Ω)

• Volt (V)

• Watt (W)

Which device converts chemical energy directly into electrical energy?

• Fuel cell

• Battery

• Solar cell

• DC generator

How is current measured?

• In parallel with a voltmeter

• In series with an ammeter

• In series with an ohmmeter

• In parallel with an ohmmeter

What is the symbol for resistance?

• V

• I

• R

• Ω

Which of the following is a type of DC voltage source that operates based on the photovoltaic effect?

• Battery

• Fuel cell

• Solar cell

• DC generator

According to Ohm’s Law, what is the formula to calculate voltage?

• V = I × R

• V = I / R

• V = R / I

• V = I + R

What is the current through a 15 Ω resistor connected to a 30 V battery?

• 2 A

• 1.5 A

• 3 A

• 0.5 A

What power is dissipated by a 40 Ω resistor when a voltage of 6V is connected across it?

• 1.2 W

• 0.9 W

• 2.4 W

• 1.5 W

What is the unit of power in an electric circuit?

• Volt (V)

• Ampere (A)

• Ohm (Ω)

• Watt (W)

How much energy is used by a light-emitting diode when it is illuminated by a 10 mA current at a voltage of 2 V for 30 minutes?

• 60 J

• 30 J

• 36 J

• 72 J