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Olympiad Test: Electricity and Circuits - Class 6 MCQ


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10 Questions MCQ Test Science Olympiad Class 6 - Olympiad Test: Electricity and Circuits

Olympiad Test: Electricity and Circuits for Class 6 2024 is part of Science Olympiad Class 6 preparation. The Olympiad Test: Electricity and Circuits questions and answers have been prepared according to the Class 6 exam syllabus.The Olympiad Test: Electricity and Circuits MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Electricity and Circuits below.
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Olympiad Test: Electricity and Circuits - Question 1

The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. 

If a third lamp Z is connected in parallel with lamp X, then what will happens to the brightness of the lamp Y? 

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 1

The third lamp Z is connected parallel to X, so the current gets divided among X and Z. So both bulbs X and Z light dimmer and the bulb Y lights brighter than earlier because current through it increases.

Olympiad Test: Electricity and Circuits - Question 2

There is a mistake in the given classification table

Which of the following is placed incorrectly in the groups?

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 2

Graphite is a conductor of electricity.

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Olympiad Test: Electricity and Circuits - Question 3

What is the function of the component shown above?

Olympiad Test: Electricity and Circuits - Question 4

Study the classification carefully and select the correct option for X, Y and Z. 

 

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 4

In X, the electrical energy is converted into sound energy. In Y, the electrical energy is converted into light energy. In Z, the electrical energy gets converted into heat energy. So, (C) is the correct option.

Olympiad Test: Electricity and Circuits - Question 5

Direction: Observe the given figure and answer the following question. 
The bulb will glow when a _____ is placed in between the probes.

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 5

Key is a metallic object. When it is placed in between probes then current can easily flow in the circuit.

Olympiad Test: Electricity and Circuits - Question 6

Manu connected three bulbs to a cell as shown in figure. She found that filament of bulb is broken. Which of the following statements is correct? 

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 6

Bulb Q is fused because its filament is broken and as it is fused the circuit is broken. So none of the bulb will glow.

Olympiad Test: Electricity and Circuits - Question 7

Look at the given figure. It consists of a cell, a bulb with the two terminals X and Y and wires with ends P and Q; S and R.
The direction of current will be

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 7

The direction of current will be PQRS because the current flows from positive terminal of the cell to the negative terminal.

Olympiad Test: Electricity and Circuits - Question 8

Read the given statements and select the correct option.
Statement 1 : In an electric circuit, the direction of current is taken to be from the negative to the positive terminal of the electric cell.
Statement 2 : A current can flow only when its path forms a closed loop.

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 8

Statement 1:  In an electric circuit, the direction of current is taken to be from the negative to the positive terminal of the electric cell. This statement is wrong. In an electric circuit, the direction of current is taken to be from the positive to the negative terminal of the electric cell.
Statement 2: A current can flow only when its path forms a closed loop. This statement is true

Olympiad Test: Electricity and Circuits - Question 9

Label the dry cell in the correct order.

Olympiad Test: Electricity and Circuits - Question 10

Which of the following statements is correct regarding the maximum brightness of the bulb used in the circuit?

Detailed Solution for Olympiad Test: Electricity and Circuits - Question 10

Brightness of bulb can be increased by increasing the current through the bulb. This can be achieved by connecting a similar battery in the same order.

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