Electricity Tes...

Fuse wire is made of :

Two wires of same metal have the same length but their cross-sections area in the ratio 3 : 1. They are joined in series. The resistance of the thicker wire is $$10\Omega$$ .The total resistance of the combination will be:

$$1kWh= $$ _________?

 If $$R_{1}$$ and $$R_{2}$$ are the resistances of two resistors connected in series combination, their effective or net resistance is given by....

Kilowatt is the unit of electrical _______ but kilowatt-hour is the unit of electrical _______.

What is the maximum resistance one can make with ten $$1 \Omega$$ resistors?

Two fuse wires of the same length are rated 5 A and 20 A.Which of the fuse wires is thicker and why ?

An electric kettle is rated as $$2.5\ kW, \ 250\ V$$. Find the cost of running the kettle for two hours at $$60\ \text{paisa}/\text{unit}$$.

An air conditioner is rated $$240\ V, 1.5\ kW$$. The air conditioner is switched on $$8\ hrs$$ each day. What is electrical energy consumed in $$30\ days$$?

Five resistors each of 1 ohm are connected in parallel. The resultant resistance of the combination is :