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CBSE - Class 10 Science Electricity Worksheet
What is the full fom of LED?
Light Emitting Diode
b.Light Emission Diode
Which of the following terms does not represent electrical power in a circuit?
$I^2R$
b.$IR^2$
c.$VI$
d.$\frac{V^2}{R}$
To detect obstacles in the path man, birds and electronic device uses sensor. If true can you tell name of the sensors used by man, bird, electronic devices.
The values of current $I$ flowing in a given resistor for the corresponding values of potential difference $V$ across the resistor are given below –
Plot a graph between $V$ and $I$ and calculate the resistance of that resistor.
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be –
100 W
b.75 W
c.50 W
d.25 W
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be –
1:2
b.2:1
c.1:4
d.4:1
What is a circuit?
Rate of flow of electrons.
b.A closed path to flow current.
In the figure, the voltages are v1(t)=100cos(wt),v2(t)=100cos(wt+π18) and v3(t)=100cos(wt+π36). The circuit is in sinusoidal steady state, and R<<wL.P1,P2,P2 and P3 are the average power outputs. Which one of the following statements is true?
P1=P2=P3=0
b.P1<0,=P2>0,P3>0
c.P1<0,=P2>0,P3<0
d.P1>0,=P2<0,P3>0
What is current?
Rate of flow of electrons
b.Resist the flow of electorns
What is voltage?
Force required to move electrons
b.Potential difference between two points
What type of circuits is used for wiring system in our home?
Series circuits
b.Parallel circuits
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