current electricity

____________ electricity is the flow of electric charge from one place to another.

Electrons move towards the point of ________________ potential.

• higher

• lower

Electric potential is measured in _________.

• volts

• amps

• friciton

____________________ is the opposition of a material to the flow of electric current.

• Resistance

• Current

• Static

• Electricity

------ is called the increase in resistance per unit original resistance per degree kelvin rise of temperature

• Thermal velocity

• temperature coefficient of electrical resistivity

• temperature coefficient of electrical resistance

• conducance

13. Drift velocity vd varies with the intensity of electric field as per the relation

• (a) v_d ∝ E

• (b) v_d ∝ 1/E

• (c) v_d = constant

• (d) v_d ∝ E²

15. From the graph between current I and voltage V shown below, identify the portion corresponding to negative resistance

• (a) AB

• (b) BC

• (c) CD

• (d) DE

16. Which of the following I-V graph represents ohmic conductors?

• (a) A

• (b) B

• (c) C

• (d) D

20. The resistivity of alloy manganin is

• (a) Nearly independent of temperature

• (b) Increases rapidly with increase in temperature

• (c) Decreases with increase in temperature

• (d) Increases rapidly with decrease in temperature

10⁶ electrons are moving through a wire per second, the current developed is

• a) 1.6 x 10^-19A

• b) 1 A

• c) 1 .6 X 10^-13 A

• d) 10⁶ A