EXAM PAPER LEAKED FOR CLASS 10 SCIENCE CHAPTER ELECTRICITY

 Class 10 Physics Exam Paper: Electricity

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Instructions:

• Attempt all questions.

• Write your answers in the space provided.

• Show all necessary steps in calculations.

• Use appropriate units wherever necessary.

Section A: Multiple Choice Questions
A) Ampere
B) Volt
C) Ohm
>D) Coulomb
A) Rubber
B) Glass
C) Copper
D) Plastic
A) 7 volts
B) 2.5 volts
C) 10 volts
D) 0.4 volts
A) P = V/R
B) P = VI
C) P = V^2/R
D) P = IR
A) 1 ohm
B) 6 ohms
C) 9 ohms
D) 12 ohms

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1. A) Ampere

1. C) Copper

1. C) 10 volts

1. C) P = V^2/R

1. B) 6 ohms

6. >Electric current is the flow of electric charge carriers, usually electrons, through a conductor.

6. >Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

6. >A conductor is a material that allows the flow of electric charge, while an insulator is a material that does not allow the flow of electric charge.

6. Resistance (R) = Voltage (V) / Current (I) = 12V / 3A = 4 ohms.

>Current through 4Ω resistor (I_4Ω) = Voltage (V) / Resistance (R) = 12V / 4Ω = 3A.

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>What is the SI unit of electric current?
Which of the following materials is a good conductor of electricity?
>What is the potential difference across a component with a resistance of 5 ohms when a current of 2 amperes flows through it?
>Which of the following is the correct formula to calculate electrical power?
>A circuit has three resistors connected in series with resistances of 2 ohms, 3 ohms, and 4 ohms respectively. What is the total resistance of the circuit?
Section B: Short Answer Questions
>Define electric current.
>State Ohm's Law.
>Explain the difference between a conductor and an insulator.
>Calculate the resistance of an electrical component if a potential difference of 12 volts produces a current of 3 amperes through it.
Your Answer:
Section C: Long Answer Questions
>Two resistors with resistances of 6 ohms and 4 ohms are connected in parallel across a 12-volt battery. Calculate the total current drawn from the battery and the current flowing through each resistor.
Your Answer:
>Describe the factors that affect the resistance of a conductor.
Your Answer:
>Explain why a fuse is used in electrical circuits and how it works.
Your Answer:
Answers:
Section A: Multiple Choice Questions
Section B: Short Answer Questions
Section C: Long Answer Questions
>Total current (I_total) = Voltage (V) / Total resistance (R_total) = 12V / (6Ω + 4Ω) = 1.2A.
>Current through 6Ω resistor (I_6Ω) = Voltage (V) / Resistance (R) = 12V / 6Ω = 2A.
>Factors affecting resistance include the type of material, length of the conductor, cross-sectional area, and temperature.
>A fuse is used to protect electrical circuits from overcurrent. It works by containing a short piece of wire designed to melt and break the circuit if the current exceeds a certain level, thus preventing damage to the circuit components.
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