Physics 1 Marks Question

As the simplest form is = i²Rt
So, U is directly proportional to i².

Because potentiometer doesn't draw any current for itself from the primary circuit and hence gives more accurate measurement thereby acting as an ideal voltmeter. It uses null method to measure.

If there can be no current inside a conductor there can be current on its surface so "there can be no current through it" is wrong.

As electron doesn't travel linearly so we need to calculate average time thus we need to consider drift distance for long time. That can not be calculated in case of t → 0.

Direction of current is in opposite direction of electron moving thus the current is from front to rear.

All in series.
All in parallel.
Two parallel and one in series.

As the copper has higher conductance than aluminum so there is low power loss thus it consumes lesser power.

No the complete circuit (which is the only condition to flow current) restores number of electrons equal to the number of electrons passed through wire.

No, the work done by a battery is not always equal to the thermal energy developed in the electrical circuit. In case of a non-ideal battery, the work done by the battery is the sum of the thermal energy developed in the electric circuit and the thermal energy developed in the internal resistance of the battery. 12 C V² of energy is lost in the form of heat and electromagnetic radiation.

Yes as charge passes through it is is charged. For example we use electrical magnets in some equipment.

Yes both statements are correct.

Only charge goes from the wire, rate of flow of charge is known as current.