Test
Electricity
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Preguntas del test (13)
1What is a volt equivalent to?
- AOne coulomb per joule
- BOne watt per Joule
- COne joule per coulomb
- DOne Amp per Ohm
2Current is measured in Amps and is measured using an ammeter
- AVerdadero
- BFalso
3What is the circuit symbol for a battery?
- A
- B
- A
4An/A ______________ is a material that allows current to easily flow through it
- AInsulator
- BConductor
- CHouse
5In mains electricity, what is the quoted voltage and frequency for a.c?
- A23V
- B5 MHz
- C230V
- D50Hz
- E5Hz
- F4.5V
6If a resistor has a resistance of 30 ohms and the circuit(series) has a current of 5A, what is the resistor's voltage?
- A150V
- B150A
- C149V
- D150.5V
7State the energy change in a filament lamp
- AElectrical energy --> Light Energy
- BElectrical Energy --> Kinetic Energy
- CElectrical Energy --> Heat Energy
- DElectrical Energy --> Sound energy
8The Symbol for a capacitor is:
- AVerdadero
- BFalso
9In terms of a thermistor, when the temperature decreases, the resistance _________________?
- AIncreases
- BDecreases
- CStays the same
10What does LED stand for?
- ALight emitting detector
- BLight Emission Detector
- CLaura & Evelyn Died
- DLight Emitting Diode
11Why is a resistor always connected in series with the LED?
- AIt is there to make the circuit more complicated for National 5 Physics students....
- BIn order to protect the LED, in case of a voltage fluctuation.
- CTo be able to use the formula V=IR in all cases...
12What is the circuit symbol for a motor?
- A
- B
- C
- D
- E
- F
- A
13An LED, connected to a 5.0V battery in series, is operating correctly. The potential difference across the LEd is 1.6V when it is at its operating current of 20mA, Calculate the resistance of the resistor.
- A170 Ohms
- B189 Ohms
- C0.068 Ohms
Información
- Descripción
- May need calculator
- Autor
- dsimpson2908
- Idioma
- English
- Visitas
- 5
- Valoración
- Aún sin valoraciones Valora este test