Resistance Calculation

An Ac circuit with f=1000 Hz consists of a cail of 200 mH and negligible resistance. Calculate the voltage across the coil, if the effective current of 5 mA is flowing.

State ohm's law. In the circuit shown in figure, a voltmeter reads 30 volts when it is connected across 400 ohm resistance. Calculate what the same voltmeter will read when it is connected across the 300 ohm resistance.

In the circuit shown in figure-3 .3 89, the voltmeter reads 30V when it is connected across 400 Omega resistance. Calculate what the same voltmeter will read when it is connected across the 300 Omega resistance.

In the circuit given below, a voltmeter reads 20V when it is connected across 400Omega resistance. Calculate what the same voltmeter will read when connected across the 200Omega resistance.

In the circuit, a voltmeter reads 30 V when it is connected across 400 Omega resistance. Calculate what the same voltmeter will read when it is connected across the 300Omega resistance?

In the circuit shows in Fig. 6.22 , a voltmeter reads 30 V when it is connected across a 400 omega resistance. Calculate what the same voltmeter would read when it is connected across the 300 Omega resistance.

A thin copper rod of radius 1mm having an electrical resistance of 100 Omega is connected to battery of emf 12 volts and negligible internal resistance through a wire of negligible resistance. Calculate current density in the wire. Also , calculate the number of electrons entering one and of the rod per seconds.

Two resistors 4 Omega and 6 Omega connected in parallel. The combination is connected across a 6 V battery of negligible resistance. Calculate (a) the current through the battery (b) current through each resistor.