Electricity Tes...

Resistor $$R_1$$ and $$R_2$$ have an equivalent resistance of $$6 \ \Omega$$ when connected in the circuit shown. The resistance of $$R_1$$ could be (in $$\Omega$$) $$(R_1<R_2)$$

What will be the effective resistance between the points P and Q in the following circuit

A block has dimensions $$1\ cm, 2\ cm$$ and $$3\ cm$$. Ratio of the maximum resistance to minimum resistance between any pair of opposite faces of this block is:

Two bulbs take $$50$$ watts each when connected in parallel to $$100\ V$$ source. The total power consumed by them when they are connected in series with the same source is

An electric motor operates on a $$50 \ V$$ supply and a current of $$1 \ A $$. If the efficiency of the motion is $$30 \ \%$$, what is the resistance of winding of motion ?

Two wires $$A$$ and $$B$$ of same material and same mass have radius $$2r$$ and $$r$$ and the length of the wire B is half the length of the wire  $$A$$. If resistance of wire $$A$$ is $$34\Omega$$, then resistance of $$B$$ will be:

If the resistance in the circuit is increased four times by keeping the potential difference the same, the current in the circuit is ___________.

Mohan uses one television of $$100$$ W for $$10$$ hrs. How much energy is consumed by Mohan?

When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become:-

Find the current supplied by the battery as shown in the figure.