WorksheetsElectricity
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
What components are essential?
a)
Generator, control device and receiver
b)
Generator, Conductor, protection device
c)
Conductor, receiver and control device
d)
generator, conductor and receiver
2.
What is the correct?
a)
V=IxR
b)
V=I/R
c)
V=PxR
d)
V=IxP
3.
What is the correct?
a)
E=VxI
b)
E=Pxt
c)
E=P/t
d)
E=VxR
4.
In what circuit the intensity of the light reduce when add lamps?
a)
The intensity never depends on the number of lamps
b)
In a parallel circuit
c)
In a series circuit
d)
In all circuits the intensity depends on the number of lamps
5.
Resolve the circuit
a)
Vt=10v, It=1A, Rt=10Ω, Pt=10w
b)
Vt=5v, It=10A, Rt=10Ω, Pt=50w
c)
Vt=5v, It=5A, Rt=10Ω, Pt=25w
d)
Vt=10v, It=2A, Rt=5Ω, P=20w
6.
Resolve the circuit
a)
Vt=12v, It=1A, Rt=12Ω, Pt=12w
b)
Vt=12v, It=2A, Rt=6Ω, Pt=24w
c)
Vt=12v, It=12A, Rt= 1Ω, Pt=144
d)
Vt=12v, It=6A=, Rt=2Ω, Pt=72w
7.
Name the next component
a)
Battery
b)
Transistor
c)
Capacitor
d)
Diode
8.
Name the next component
a)
Capacitor
b)
Switch
c)
Transistor
d)
Relay
9.
Name the following component
a)
Push buttton
b)
Switch
c)
2 ways switch
d)
crossing switch
10.
Name the following component
a)
LDR
b)
PTC
c)
NTC
d)
LED
11.
What is its purpose?
a)
control the direction of the current
b)
Store energy
c)
Amplity the current
d)
oppose to the flow of the current depending of the temperature
12.
What lamps shine?
a)
All
b)
2 and 3
c)
1 and 3
d)
none
13.
How does this circuit work?
a)
When push the switch the transistor changes the position of the 2 ways switch and the led shines
b)
When push the 2 ways switch the led shines thanks to the capacitor
c)
When push the switchthe relay changes the position of the 2 ways switch and the led shines
d)
When push the switch the led shines because the transistor amplifies the current
14.
A example of this circuit is...
a)
A heating: when the temperature is low the motor works
b)
A fan: When the temperature is high the motor works
c)
A sensor: show the temperature of the motor
d)
An alarm: If the temperature of the motor is high the alarm rings
15.
How does this circuit work?
a)
When the LDR receives light the relay changes and the led shines
b)
When the LDR doesn´t receive light the relay change and the led turns off
c)
When the LDR generates light the led shines
d)
When the LDR generates light the led turns off
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