Two bulbs are marked $60\, W , 220\, V$ and $100\, W$, $220\, V$. These are connected in parallel to $220\, V$ mains. Which one out of the two will glow brighter ?
Two bulbs are marked $60\, W , 220\, V$ and $100\, W$, $220\, V$. These are connected in parallel to $220\, V$ mains. Which one out of the two will glow brighter ?
In parallel combination, the bulb having more power glows more. Therefore, the bulb marked $100 W , 220 V$ glows brighter
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$(a)$ Explain how does a cell maintain current in a circuit.
$(b)$ In the circuit given below the resistance of the path $x T y=2\, \Omega$ and that of $x Z y=6, \Omega$.
$(i)$ Find the equivalent resistance between $x$ and $y.$
$(ii)$ Find the current in the main circuit.
$(iii)$ Calculate the current that flows through the path $x T y$ and $x Z y$.
$(a)$ Explain how does a cell maintain current in a circuit.
$(b)$ In the circuit given below the resistance of the path $x T y=2\, \Omega$ and that of $x Z y=6, \Omega$.
$(i)$ Find the equivalent resistance between $x$ and $y.$
$(ii)$ Find the current in the main circuit.
$(iii)$ Calculate the current that flows through the path $x T y$ and $x Z y$.
What is meant by resistance of a conductor ? Name and define its $SI$ unit. List the factors on which the resistance of a conductor depends. How is the resistance of a wire affected if
$(i)$ its length is doubled,
$(ii)$ its radius is doubled. ?
What is meant by resistance of a conductor ? Name and define its $SI$ unit. List the factors on which the resistance of a conductor depends. How is the resistance of a wire affected if
$(i)$ its length is doubled,
$(ii)$ its radius is doubled. ?