Olympiad Test: Electricity And Circuits - 2 - Class 6 MCQ

The objects that are conductors will allow the flow of electricity through them. The insulators will not allow the flow of current through them. All metals are good conductors of electricity.  

Here, the conductors are Penny, Nickel, Key, Paper clip and Brass paper fastener as these are made of metals. The insulators are Rubber band, Tooth pick and Glass microscope slide.

'M' part of the bulb is made with insulator. 

Because M is the glass cover, N is the filament, Q is the supporting wires, while R is the positive terminal of the bulb.

- The correct answer is B: Ammeter.
- An ammeter is specifically designed to measure electric current in a circuit.
- It is connected in series with the circuit so that the entire current flows through the ammeter.
- This allows the ammeter to accurately measure the flow of charge in amperes.
- Other options, like a tester or resistor, do not measure current.
- A voltameter is not a standard term in measuring circuits.

• A circuit is the closed loop or path through which electricity flows.
• An orbit refers to the path of celestial bodies.
• A filament is the thin wire inside a light bulb that heats up and produces light when electricity passes through it.
• Current refers to the flow of electricity, but not the path it takes.

So, the correct answer is D: Circuit.

When your hands are wet, the water reduces the resistance of your skin, making it easier for electrical current to flow through your body. Wet skin provides less resistance compared to dry skin, increasing the risk of electric shock. Therefore, Sanchit's mother warned him to avoid contact with electrical appliances when his hands are wet to reduce the chances of electrical injury.

So, the correct answer is D: Your resistance to be lower.

In the given diagram, the components A and B are identified as follows:

• A: This is the part of the circuit that acts as a switch. It allows you to open or close the circuit. When it is in the closed position, electricity flows through the circuit, lighting up the bulb. When it is open, the circuit is incomplete, and the bulb does not light up.
• B: This is the battery, which provides the electrical energy needed for the circuit. It has a positive (+) and negative (−) terminal, indicating the direction of current flow.

Correct Answer: D

• A = Switch
• B = Battery

The filament of a bulb is made of tungsten because it has a high melting point and can withstand the high temperatures generated when the current passes through it, allowing it to glow red hot and emit light.

A battery is formed when two or more cells are connected together, typically in series or parallel, to provide electrical energy. The combination increases the voltage or current, depending on how the cells are connected.

• Circuit refers to the complete path for the flow of electricity.
• Switch is a device used to control the flow of electricity in a circuit.
• None of these is incorrect since the correct answer is "Battery."

Lamps X and Y are connected in series with a battery. If a third identical lamp Z is connected in parallel with X, then resistance of whole circuit reduces. Due to this, current drawn from battery will increase and bulb Y will be brighter than normal.

Our body is a conductor of electricity because it contains water and salts, which allow electric current to pass through. When we touch a naked current-carrying wire, electricity flows through our body to the ground, potentially causing an electric shock.

• A (Source of electricity): This is incorrect because the body does not produce electricity in this context.
• C (Insulator of electricity): This is incorrect because insulators resist the flow of electricity, and the human body does not act as an insulator.
• D (A and B both): This is incorrect because the body is not a source of electricity in this scenario.