Electricity Tes...

What is the highest equivalent resistance that can be secured by combinations of four coils of resistance $$4\ \Omega$$, $$8\ \Omega$$, $$12\ \Omega$$, $$24\ \Omega$$?

Find energy in kWh consumed in 10 hours by four devices of power $$500\ W$$ each?

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 $$\dfrac{R}{R'}$$ is - 

An electric bulb is rated $$220\ V$$ and $$100\ W%$$. When it is operated on $$110\ V$$, the power consumed will be:

A 5 amp fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is

If a third identical resistor is added in parallel in a circuit of two identical parallel resistors. Calculate the ratio of the new equivalent resistance to the old?

Three resistor of $$10 \Omega$$, $$20 \Omega$$, and $$30 \Omega$$ are connected in parallel in a circuit. Calculate the equivalent resistance.

In a DC circuit when a switch is closed to operate the circuit, the electrons that cause the current:

A fuse wire with radius $$1\ mm$$ blows at $$1.5\ A$$. The radius of the fuse wire of the same material to blow at $$3\ A$$ will be:

A current is flowing in a circuit consisting of a resistor and a battery.
What happens to the power dissipated in the resistor when the resistance is quadrupled and the voltage remains constant?