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CBSE - Class 10 Science Electricity Worksheet
What is the full fom of LED?
Light Emitting Diode
b.Light Emission Diode
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 type of circuits is used for wiring system in our home?
Series circuits
b.Parallel circuits
What is voltage?
Force required to move electrons
b.Potential difference between two points
A piece of wire of resistance $R$ is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is $R'$, then the ratio $\frac{R}{R'}$ is –
$\frac{1}{25}$
b.$\frac{1}{5}$
c.5
d.25
KIRCHOFF JUNCTION RUL IS BASED ON CONSERVATION OF CHARGE.
What is current?
Rate of flow of electrons
b.Resist the flow of electorns
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
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.
What is a circuit?
Rate of flow of electrons.
b.A closed path to flow current.
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.
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