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CBSE - Class 10 Science Electricity Worksheet
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 voltage?
Force required to move electrons
b.Potential difference between two points
KIRCHOFF JUNCTION RUL IS BASED ON CONSERVATION OF CHARGE.
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.
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
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
Two resistors, R1 = 10Ω and R2= 20Ω, are connected in parallel to a battery. Which of the following is true regarding the current (I) and voltage (V)?
V is different across both, I is the same
b.I is different across both, V is the same
c.Both I and V are the same for both resistors
d.Both I and V are different for both resistors
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