Electricity Tes...

A wire of resistance R is elongated n-fold to make a new uniform wire. The resistance of new wire

The resistance across $$A$$ and $$B$$ in the given figure will be:

In shown diagram, if voltage of battery is doubled and resistance kept constant then what is the new Power dissipated at resistor(Consider $$P$$ was the initial power dissipation) ?

This question relates to the DC circuit shown below.
The values for current, voltage, and resistance in the circuit are graphed from point A through point G in the graphs directly below.
Which of the graphs shows the resistance from point A to point G?

All resistors in the circuit have the same resistance, $$R$$, and the battery is having a constant voltage of $$V$$.
Find out power dissipated by resistor $$f$$. Given that  the power dissipated by resistor $$e$$ is $$P$$:

Three resistors $$R_1, R_2$$, and $$R_3$$ are connected as shown below.
The resistance of $$R_3$$ is $$1 \Omega$$ and it is known that the value of $$R_3$$ is smaller than the values of $$R_1$$ or $$R_2$$. The resistances of $$R_1$$ and $$R_2$$ are unknown.
Select the best statement describing the equivalent resistance of this combination:

Metals are good conductor because

What is the power dissipated by each lamp of resistance $$60 \Omega$$?

The dry cell of E.M.F $$12\ V$$, is connected in series to a $$3 \Omega$$ and a $$6 \Omega$$ resistor. Calculate the total power supplied by the dry cell.

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