विधुत और प्रतिरोध पर प्रश्न

Gourav and Sonali are working on a science project about materials. They need to identify which of the following is not a semiconductor. Can you help them?

• Silicon

• Germanium

• Mercury

• none

Answer explanation

Mercury is a metal and does not exhibit semiconductor properties like Silicon and Germanium, which are commonly used in electronic devices. Therefore, Mercury is the correct answer as it is not a semiconductor.

Arman is trying to understand what volt/ampere represents in his physics class.

• Ampere

• Volt

• Ohm

• Watt

Answer explanation

Volt/ampere represents resistance, which is measured in Ohms. According to Ohm's Law, resistance (Ohm) is the ratio of voltage (Volt) to current (Ampere). Therefore, the correct answer is Ohm.

Anjna is conducting an experiment to measure how much electrical resistance is present in a circuit. She wonders what the SI unit of electrical resistance is.

• Ampere

• Volt

• Ohm

• Watt

Answer explanation

The SI unit of electrical resistance is the Ohm. It quantifies how much a material opposes the flow of electric current, making it the correct choice among the options provided.

While working on a science project, Arman needs to measure the electric current flowing through a circuit. He remembers that the SI unit of electric current is

• Watt

• Volt

• Ohm

• Ampere

Answer explanation

The SI unit of electric current is the Ampere, often abbreviated as 'A'. It measures the flow of electric charge in a circuit, making it the correct choice among the options provided.

Akashi is working on a project that requires him to connect 3 resistors of 7, 2, and 6 ohms in series. What will be the equivalent resistance?

• 2 ohms

• 20 ohms

• 15 ohms

• 12 ohms

Answer explanation

To find the equivalent resistance in series, add the resistances: 7 ohms + 2 ohms + 6 ohms = 15 ohms. Therefore, the correct answer is 15 ohms.

Jatin is conducting an experiment to measure the intensity of light emitted from a lamp. What is the S.I. unit of intensity?

• Joule

• Watt

• Volt

• none

Answer explanation

The S.I. unit of intensity of light is the Watt, which measures power. However, the correct answer in the context of light intensity is actually the Candela, not Volt. Therefore, 'none' is the most appropriate choice.

Prachi is studying the concept of abundance in her chemistry class. She wonders, what is the SI unit of abundance?

• Joule

• Watt

• Volt

• none

Answer explanation

The SI unit of abundance is not typically defined in terms of Joules, Watts, or Volts. In chemistry, abundance often refers to the relative amount of an isotope, which does not have a specific SI unit. Therefore, the correct answer is 'none'.

During a science experiment, Abishek is trying to determine the melting point of tungsten. At what temperature does tungsten melt?

• 2500°C

• 3500°C

• 4500°C

• 5500°C

Answer explanation

Tungsten has a melting point of approximately 3422°C, which is commonly rounded to 3500°C. Therefore, the correct answer is 3500°C.

Gourav is studying electric circuits in his physics class. He learns that the SI unit of electric power is essential for understanding how much energy devices consume. What is the SI unit of electric power?

• Ampere

• Volt

• Ohm

• Watt

Answer explanation

The SI unit of electric power is the Watt. It measures the rate at which energy is consumed or produced in an electric circuit, making it essential for understanding device energy consumption.

Vansh is conducting an experiment in his physics lab where he needs to measure the amount of electric charge flowing through a circuit. What is the S.I. unit of charge that he should use?

• Volt

• Ohm

• Joule

• Coulomb

Answer explanation

The S.I. unit of electric charge is the Coulomb. It quantifies the amount of charge flowing in a circuit, while Volt measures electric potential, Ohm measures resistance, and Joule measures energy.