$1\, \mu \,A =\ldots \ldots \ldots \,A$
What is the power of a bulb rated at $2.5 \,V$ $500\, mA$ ?
Mention the condition under which charges can move in a conductor. Name the device which is used to maintain this condition in an electric circuit.
A wire is $1.0\, m$ long, $0.2\, mm$ in diameter and has a resistance of $10 \, \Omega$. Calculate the resistivity of its material.
Three resistors of $5\, \Omega, 10\, \Omega$ and $15\, \Omega$ are connected in series and the combination is connected to battery of $30\, V$. Ammeter and voltmeter are connected in the circuit. Draw a circuit diagram to connect all the devices in proper correct order. What is the current flowing and potential difference across $10\, \Omega$ resistance ?