Electronics-Voltage and Current
Electronics-Voltage and Current
1. If 60 J of energy are available for every 15 C of charge, what is the voltage?
- 4 V
- 60 V
- 15 V
- 0.25 V
2. An atom's atomic number is determined by the number of:
- neutrons minus protons
- protons
- electrons
- neutrons
3. A voltage will influence current only if the circuit is:
- open
- insulated
- high resistance
- closed
4. Which resistive component is designed to be temperature sensitive?
- Thermistor
- Rheostat
- Potentiometer
- Photoconductive cell
5. A voltmeter is used:
- to measure current
- in series with the circuit
- in parallel with the circuit
- to measure coulombs
6. If the current in a circuit equals 0 A, it is likely that the
- voltage is too high
- resistance is too low
- circuit has a short
- circuit is open
8. Which part of an atom has no electrical charge?
- Electron
- Neutron
- Proton
- All of the above
9. Which voltage source converts chemical energy to electrical energy?
- Electrical generator
- Battery
- Solar cell
- Electronic power supply
10. An example of potential energy is:
- tea-kettle steam
- a moving vehicle
- the sun
- a battery