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Q:

Electrical Pressure is also called

A) Current B) Voltage
C) Resistance D) Power
 
Answer & Explanation Answer: B) Voltage

Explanation:

Electrical Pressure is also called as Voltage. Voltage is measured in Volts.

 

Volt : A unit of electrical pressure or Voltage is called Volt.

 

One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.

 

Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.

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Q:

When two similar sources vibrate with slightly different frequencies , a regular rise and fall occurs in the loudness of tone. This phenomenon is known as 

A) doppler effect B) beats
C) resonance D) echo
 
Answer & Explanation Answer: B) beats

Explanation:

Beats means the periodic increase and decrease in loudness heard when two notes of nearly the same frequency are sounded simultaneously.

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Q:

If a band is played on the moon the sound will 

A) reverberate B) be heard by us faintly
C) be heard upto 10 km from it D) not be heard at any distance at all from it
 
Answer & Explanation Answer: D) not be heard at any distance at all from it

Explanation:

As there is no atmosphere surrounding the moon, the second from any band that is played there cannot travel outwards there is no material medium surrounding if for its propagation.

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Q:

Radian is used to measure

A) Temperature B) Intensity of Flame
C) Angle D) Solid Angle
 
Answer & Explanation Answer: C) Angle

Explanation:

Kelvin is used to measure Temperature,

Candela is used to measure Intensity of flame,

Steredian is used to measure Solid Angle.

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2 3047
Q:

Which of the following has highest penetration power?

 

A) α– radiations   B) β– radiations  
C) γ– radiations   D) All have same penetration power.  
 
Answer & Explanation Answer: C) γ– radiations  

Explanation:
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Q:

The product of mass of a body and the acceleration produced in it equals the ___________ acting on it.

 

A) force B) impulse
C) torque D) kinetic energy
 
Answer & Explanation Answer: A) force

Explanation:
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Q:

According to ohm's law, which of the following is true?

 

A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends B) The current flowing through a wire is directly proportional to its resistance
C) The current flowing through a wire is indirectly proportional to its length D) The current flowing through the wire is indirectly proportional to the Potential Difference applied across its ends  
 
Answer & Explanation Answer: A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends

Explanation:
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Q:

Buoyancy depends on

A) the mass of the liquid displaced B) the mass of the body
C) the depth to which the body is immersed D) the shaped of the body
 
Answer & Explanation Answer: A) the mass of the liquid displaced

Explanation:

Buoyancy or Upthrust, is an upward force exerted by a fluid that opposes the weight of an immersed object.

In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.

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