1_D C Circuits

Avni is trying to understand the mathematical form of Ohm's Law. Which of the following equations represents Ohm's Law?

• V=IR

• V/I=R

• I=V/R

• All of the above

Ohm's Law is not applicable to

• Linear devices

• Non linear devices

• Metallic conductors

• Non metallic conductors

• Zener diode

Ohm's law is applicable only when

• Current is constant

• Voltage is constant

• Power is constant

• All physical conditions are constant

Imagine Carol is working on a project that involves electrical circuits. He needs to apply Ohm's Law for AC circuits. What is the mathematical form of Ohm's Law for AC circuits?

If a number of resistors are connected in parallel, then the reciprocal of total resistance is equal to

• Sum of individual resistances

• Sum of the reciprocal of individual resistances

• Reciprocal of the sum of individual resistances

• All of these

According to Kirchoff’s voltage law,

• The algebraic sum of all the e.m.f’s in the circuit is zero

• Algebraic sum all the voltage drops in the circuit is zero

• Algebraic sum of e.m.f’s plus algebraic sum of voltage drops is equal to zero

• All of these

 In any network of wires carrying currents, the algebraic sum of all currents meeting at a point is equal to

• Sum of all the currents

• Zero

• Sum of outgoing currents

• Sum of incoming currents

Which among the following is true about ohm’s law?

• I ∝ V

• I = V/R

• V = IR

• All of these

The unit of electrical energy is

• Joules

• Watt - sec

• Kilowatt - hour

• All of these

Electrical work is

• Directly proportional to the potential difference

• Directly proportional to the charge

• Directly proportional to the current

• All of these