Based on the given multiple-choice questions, what is the subject being tested?

Here are the solutions to the multiple-choice questions.

समूह 'क' (Group 'A')

• a. तल दिएको मध्ये Protista जगतमा पर्ने जीवको लक्षण कुन हो ?

  • Translation: Which of the following is a characteristic of organisms belonging to the Kingdom Protista?
  • Protista are typically unicellular eukaryotes.
  • ई. एककोषीय (Unicellular)

• b. न्युटनको चाल सम्बन्धी कुन नियममा आधारित भई अन्तरिक्षमा रकेट प्रक्षेपण गरिन्छ ?

  • Translation: Rocket propulsion in space is based on which of Newton's laws of motion?
  • Rocket propulsion operates on the principle of action and reaction, which is Newton's Third Law.
  • इ. तेस्रो नियम (Third law)

• c. तलका मध्य कुन कुन स्थायी वनस्पति तन्तुका विशेषताहरु हुन् ?

  • Translation: Which of the following are characteristics of permanent plant tissues?
  • Permanent tissues are differentiated and have lost the ability to divide. Their cells can be living or dead, and cell walls can vary in thickness. The most defining characteristic is the absence of cell division.
  • आ. कोषहरुको विभाजन हुदैन (Cells do not divide)

• d. धातुले करेन्टको प्रवाह गर्न सक्छ । धातुको यस गुणको मुख्य कारण तलका मध्ये कुन हो ?

  • Translation: Metals can conduct electricity. Which of the following is the main reason for this property of metals?
  • The ability of metals to conduct electricity is due to the presence of free, delocalized electrons.
  • अ. धातुमा स्वतन्त्र इलेक्ट्रोन हुनु (Presence of free electrons in metal)

• e. सरल यन्त्रको MAT VR प्रतिशत अनुपातलाई के भनिन्छ ?

  • Translation: What is the percentage ratio of Mechanical Advantage (MA) to Velocity Ratio (VR) for a simple machine called?
  • The ratio of Mechanical Advantage (MA) to Velocity Ratio (VR) is the efficiency of a machine.
  • अ. कार्यक्षमता (Efficiency)

• f. 1kW को हिटरलाई 1 घण्टा प्रयोग गर्दा रुपान्तरण हुने विद्युत शक्ति कति हुन्छ ?

  • Translation: How much electrical energy is converted when a 1 kW heater is used for 1 hour?
  • Step 1: Identify the given values. Power $P = 1\, kW = 1000\, \text{W}$ Time $t = 1\, hour = 1 \times 60 \times 60\, s = 3600\, \text{s}$
  • Step 2: Use the formula for energy. Energy $E = P \times t$
  • Step 3: Substitute the values and calculate. $E = 1000\, W \times 3600\, \text{s}$ $E = 3,600,000\, \text{J}$ $E = 3.6 \times 10^6\, \text{J}$
  • ई) $3.6 \times 10^6\, \text{J}$