\(
\text { Read the following statements: }
\)
\(
Y: \text { The resistivity of a semiconductor decreases with rise in temperature. }
\)
\(
Z \text { : In a conducting solid, the rate of collisions between free electrons and ions increases with rise in temperature. }
\)

Two heaters when connected in parallel across supply produced heat in time . If they are connected in series across the same power supply the heat produced in the same time is Qs. What is Qp/Qs?

\(
\text { A } 2 \text { KW boiler used for } 1 \text { hour everyday consumes the following electrical energy in thirty days : }
\)

\(
\text { A current of } 2 \text { Aflows in system of conductors shown in figure. The potential difference } V_{A}-V_{s} \text { will be : }
\)

\(
\text { A charge } Q 1 \text { exerts some force on a second charge Q2. If a 3rd charge } Q 3 \text { is brought near then the force of } Q 1 \text { exerted on } Q 2 .
\)

The resultant value of resistances each of value r ohms when connected in parallel is x , when these resistances are connected in series the resultant resistance is:

While performing the experiment to study the dependence of current on potential difference ,if the circuit used to measure the current and voltage is kept in on position for a longer time ,then

Three resistors of 1 Ω, 2 ft and 3 Ω are connected in parallel. The combined resistance of the three resistors should be

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?