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Q:

A galvanometer can be converted to a voltmeter by connecting

A) a high resistance in parallel B) a high resistance in series
C) a low resistance in series D) a low resistance in parallel
 
Answer & Explanation Answer: B) a high resistance in series

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Q:

Two vectors are said to be equal if

A) only their magnitudes are same B) only their directions are same
C) both magnitude and direction are same D) magnitudes are same but directions are opposite
 
Answer & Explanation Answer: C) both magnitude and direction are same

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Q:

If an object moves in a circular path with uniform ________, its motion is called uniform circular motion.

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

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Q:

Kelvin (K) is the unit of measurement of ________.

A) Density B) Pressure
C) Mass D) Temperature
 
Answer & Explanation Answer: D) Temperature

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Q:

The boiling point of an alcohol is 78°C. What is the temperature in Kelvin scale?

A) 78K B) 341 K
C) 373 K D) 351 K
 
Answer & Explanation Answer: D) 351 K

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Q:

Why metals conduct electricity?

A) Because of low melting point B) Because of high tensile strength
C) Because of free electrons D) Because of high atomic density
 
Answer & Explanation Answer: C) Because of free electrons

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Q:

Which one among the following is not an electro­magnetic wave?

A) X­-Ray B) R­-Ray
C) Cathode Ray D) Infrared Ray
 
Answer & Explanation Answer: C) Cathode Ray

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Q:

The color with the longest wavelength is

A) Red B) Violet
C) Indigo D) Orange
 
Answer & Explanation Answer: A) Red

Explanation:

Each color has a different wavelength.

 

Red has the longest wavelength and violet has the shortest wavelength.

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