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Q:

1 kWh = __________ × 106J.

 

A) 36 B)  3.6  
C) 6.4   D) 64
 
Answer & Explanation Answer: B)  3.6  

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1 13506
Q:

What is the SI unit of pressure

A) Pascal B) Dyne
C) Newton D) Jule
 
Answer & Explanation Answer: A) Pascal

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Q:

Quantitatively, the inertia of an object is measured by ______________.

 

A) its weight B) the product of its mass and velocity
C) its mass D) the product of its mass and acceleration
 
Answer & Explanation Answer: C) its mass

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Q:

Ball bearings are used in cycles, scooters etc to

A) Increase the friction between the wheel and the axle B) Reduce the friction between the wheel and the axle
C) Reduce the friction between ground and the whee D) None of the above
 
Answer & Explanation Answer: B) Reduce the friction between the wheel and the axle

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Q:

Is B2+ Paramagnetic or Diamagnetic?

Answer

B2+ is a Paramagnetic. 


The filled orbitals are σ(1s)22, σ∗(1s)22, σ(2s)22, σ∗(2s)22. The half-filled orbitals are π(2pxx) and π(2pyy). Since it posses 2 unpaired electrons, it is Paramagnetic in nature.

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8 13098
Q:

The working of the quartz crystal in the watch is based on the

A) Piezo - electric Effect B) Edison Effect
C) Photoelectric Effect D) Johnson Effect
 
Answer & Explanation Answer: A) Piezo - electric Effect

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Q:

Masses of stars and galaxies are usually expressed in terms of

A) neutron mass B) earth's mass
C) solar mass D) lunar mass
 
Answer & Explanation Answer: C) solar mass

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58 13003
Q:

The core of an electromagnet is made of soft iron because soft iron has 

A) small susceptibility and small retentivity B) large susceptibility and small retentivity
C) large density and large retentivity D) small density and large retentivity
 
Answer & Explanation Answer: B) large susceptibility and small retentivity

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