Online test on Ohm's Law

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Watch this Video on Ohm's law

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1. Which statement best describe the electric current? *

1 point

It is the rate of flow of electrons

It is flow of charge particles like electrons, ions etc

It is the rate of flow of electric charge

It is energy stored in a cell or a battery

2. What makes the electric charge to flow in a conductor? *

1 point

It flows because of Ohm's law

It flows due to potential difference applied across the conductor

It flows because of the presence of conducting path like a metal wire

It flows because switch is ON

3. What is the name given to the law which relates the current in a coductor to the potential difference across a conductor? *

1 point

Joule's Law

Volt's Law

Ohm's Law

Ampere's Law

4. Which of the following statements best describes the Ohm's law? *

1 point

Electric current in a conductor is inversely proportional to potential difference applied across itd ends

Electric current in a conductor is constant if temperature of the conductor is kept constant

Potential difference is directly proportional to temperature

At constant temperature, Electric current in a conductor is directly proportional to potential difference applied across its ends.

5. Under what condition Ohm's law is valid? *

1 point

at constant temperature

At constant temperature and potential difference

at constant current

At constant potential difference

6. The V-I graph for a condcutor obeying Ohm's Law is a _________________ that passes through the origin of the graph. *

1 point

Curved line

Straight line

Parallel to current axis

can be of any shape.

7. Which of the following is the correct formula showing how the current I in a conductor varies when the potential difference V applied across it is increased stepwise. *

1 point

R = VI

V = RI

I = RV

I = V

8. Two ways to increase the current drawn by a circuit can be *

1 point

Increase the resistance of the circuit; increase the potential difference

Decrease the resistance of the circuit; increase the potential difference

Decrease the resistance of the circuit; Decrease the potential difference

Increase the resistance of the circuit; increase the potential difference

9. Which one of the following statement correctly describes the resistance of a given conductor? *

1 point

Resistance is the heat energy possessed by the conductor.

Resistance is the ability of a conductor to allow flow of charges through it.

Resistance is the obstruction offered by material of conductor to the passage of electric current.

Resistance is property of a conductor which maintains a balance between electric current and potential difference and keeps the V-I graph of the given conductor always a straight line.

10. What will happen if the temperature is not kept constant during the flow of electric current in a wire? *

1 point

Electric current stops flowing

Wire will melt

Short circuit will occur

V-I grpah will not be a straight line

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