Test-7/ Education Venue Smart Classes Khunti

1. LASER का विस्तार है-

LIGHT AMPLICATION BY STIMULATED EMISSION OF REFLECTION

LIGHT AMPLIFIER BY STUNNING EMERGENCY RADIATION

LIGHT AMPLICATION BY STIMULATED EMISSION OF RADIATION

इन में से कोई नहीं

The correct answer is "LIGHT AMPLICATION BY STIMULATED EMISSION OF RADIATION". This is because LASER stands for "Light Amplification by Stimulated Emission of Radiation".

Explanation

The correct answer is "LIGHT AMPLICATION BY STIMULATED EMISSION OF RADIATION". This is because LASER stands for "Light Amplification by Stimulated Emission of Radiation".

2. शीतल पेय पधार्थों में किस अम्ल का प्रयोग किया जाता है?

कार्बोनिक अम्ल

एसिटिक अम्ल

बोरिक अम्ल

फोरमिक अम्ल

शीतल पेय पदार्थों में कार्बोनिक अम्ल का प्रयोग किया जाता है।

Explanation

शीतल पेय पदार्थों में कार्बोनिक अम्ल का प्रयोग किया जाता है।

3. ओम के नियमानुसार प्रवाहित धरा किसके समानुपाती होता है?

प्रतिरोध के

विभवान्तर के

चालकता के

प्रतिरोधता के

According to Ohm's law, the current flowing through a conductor is directly proportional to the potential difference across it. This means that the current is equal to the potential difference divided by the resistance. Therefore, the correct answer is "विभवान्तर के" (potential difference).

Explanation

According to Ohm's law, the current flowing through a conductor is directly proportional to the potential difference across it. This means that the current is equal to the potential difference divided by the resistance. Therefore, the correct answer is "विभवान्तर के" (potential difference).

4. किन लेंसों को अभिसारी लेंस कहा जाता है?

उत्तल

अवतल

गोलीय

अभियोतल

not-available-via-ai

Explanation

not-available-via-ai

5. शक्ति का SI मात्रक क्या होता है?

न्यूटन

कैलोरी

वाट

वाल्ट

The SI unit of power is the watt. Power is the rate at which work is done or energy is transferred or converted. It is measured in watts, which are equal to one joule per second.

Explanation

The SI unit of power is the watt. Power is the rate at which work is done or energy is transferred or converted. It is measured in watts, which are equal to one joule per second.

6. सूर्य का निकटम तारा मन जाता है-

ध्रुव तारे को

गेनीमेड को

प्रोक्सिमा सेंचुरी को

टाइटन को

The correct answer is "प्रोक्सिमा सेंचुरी को". This is because Proxima Centauri is the closest star to the Sun. It is located about 4.24 light-years away from the Sun and is part of the Alpha Centauri system. Proxima Centauri is a red dwarf star and is too faint to be seen with the naked eye from Earth. However, it is still considered the closest star to our solar system.

Explanation

The correct answer is "प्रोक्सिमा सेंचुरी को". This is because Proxima Centauri is the closest star to the Sun. It is located about 4.24 light-years away from the Sun and is part of the Alpha Centauri system. Proxima Centauri is a red dwarf star and is too faint to be seen with the naked eye from Earth. However, it is still considered the closest star to our solar system.

7. विधुत धरा का SI मात्रक क्या होता है?

एम्पेयर

वाल्ट

ओम

महो

The SI unit of electric current is ampere (एम्पेयर).

Explanation

The SI unit of electric current is ampere (एम्पेयर).

8. हाइड्रोजन के समस्थ्निकों की संख्या कितनी होती है?

2

1

3

4

The question is asking for the number of isotopes of hydrogen. Hydrogen has three isotopes: protium (1H), deuterium (2H), and tritium (3H). Therefore, the correct answer is 3.

Explanation

The question is asking for the number of isotopes of hydrogen. Hydrogen has three isotopes: protium (1H), deuterium (2H), and tritium (3H). Therefore, the correct answer is 3.