Q2.A cube-shaped permanent magnet is made of a ferromagnetic material with a magnetization M of about The side length is 2 cm. Magnetic dipole moment of the magnet is.
Answer : Option BExplaination / Solution: No Explaination.
Q3.Which of the following are also called lungs of our planet?
Answer : Option DExplaination / Solution:
The Amazon in South America is the largest, most diverse tropical rainforest on Earth, covering an area of five and a half million square kilometres.
The Amazon rainforest functions as a giant air machine that absorbs a large amount of carbon dioxide, and produces oxygen. That is why it is often called the "Lungs of the Earth.
Q5.Following conversion in forward and backward directions is regulated as :
Blood calcium Bone calcium
Answer : Option CExplaination / Solution:
Thyrocalcitonin (TCT) influence the metabolism of calcium inside the body. Parathyroid hormone (PTH) absorption of calcium in bone.
Q6.The resistance of a conductivity cell containing 0.001M KCl solution at 298 K is 1500 Ω. What is the cell constant if conductivity of 0.001M KCl solution at 298 K is 0.146 × 10–3 S cm–1.
Answer : Option DExplaination / Solution:
Κ= G x cell constant and G= 1/R.
Q9.An N-type Ge is obtained on doping the Ge- crystal with
Answer : Option CExplaination / Solution:
The addition of pentavalent impurities such as antimony, arsenic or phosphorous contributes free electrons, greatly increasing the conductivity of the intrinsic semiconductor.