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Q:

Women have shrill voice because of _______.

A) Low frequency B) High frequency
C) Shrill vocals D) Strong epiglottis
 
Answer & Explanation Answer: B) High frequency

Explanation:
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Q:

Which one of the following statements with regard   to   Jet   stream,   an   upper   level tropospheric wave, is not correct?

A) It is narrow band of high-velocity wind. B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.
C) Jet  streams  are typically  continuous over long distances. D) In summer, the polar front jet achieves its maximum force.
 
Answer & Explanation Answer: B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.

Explanation:

All  are  correct  except  D,  as  Jet streams  are  phenomena  of  winter. It   is   believed   that   jet   stream exercises  an  important  influence on the winter weather in India.

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Q:

What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

A) 50 B) 12
C) 24 D) 36
 
Answer & Explanation Answer: B) 12

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0 1314
Q:

If the radius of the earth decreases and its mass remains the same, then the value of "acceleration due to gravity" will _____ .

A) decrease B) increase
C) remain the same D) become zero
 
Answer & Explanation Answer: B) increase

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1 1313
Q:

The first equation of motion gives the relation between

A) position and time B) position and velocity
C) velocity and time D) velocity and acceleration
 
Answer & Explanation Answer: C) velocity and time

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0 1313
Q:

Which electromagnetic wave has the highest frequency?

A) Gamma Rays B) Radio waves
C) X rays D) Microwaves
 
Answer & Explanation Answer: A) Gamma Rays

Explanation:

In all Electromagnetic waves, Gamma Rays have the highest frequency and the lowest wavelength. Whereas Radio ways have lowest Frequency and the highest wavelength. 

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0 1310
Q:

A current I flows through a resistor. A source maintains a potential difference of V across the resistor. The energy supplied by the source in time t is 

A) V I t2 B) V I
C) V I t D) V I/t
 
Answer & Explanation Answer: C) V I t

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1 1308
Q:

During uniform motion of an object along a straight line, the ________ remains constant with time.

A) Time B) Velocity
C) Acceleration D) Distance
 
Answer & Explanation Answer: B) Velocity

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