Class 10 : science lesson 12 Electricity free online test and quiz : online mcq test for class 10 science

Electricity online mcq quiz

Electricity boostup points 

➠ The current through the cross-section of a conductor is I= 𝑸/t  Where, Q is net charge flowing across the cross section of a conductor in time t

➠ Potential difference (V) between two points = work done (W)/ Charge (Q)  : V = W/ Q

➤ Ohm’s law: 

➠ Ohm's Law deals with the relationship between voltage and current in an ideal conductor. 

➠ This relationship states that: The potential difference (voltage) across an ideal conductor is proportional to the current through it. 

➠ The constant of proportionality is called the "resistance", R.

➠ V = I R

➠ The equivalent resistance in series circuit is the sum of the individual resistances - R = R1 + R2+ R3

➠ The equivalent resistance of a parallel circuit containing resistances R1, R2 and R3 

𝟏 / 𝑹𝒆𝒇 = 1/r1 + 1/r2 +1/r3 

➠ The electric power P is given by P = VI or P= I2R = V2/R

➠ The electrical energy dissipated in a resistor is given by W = V x I x t

➠ Joule’s law of heating; H = I2RT

➠ 1 kW h = 3, 600, 000 J =3.6x106 J

Electricity online mcq quiz started from here 

koim 

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