NTSE SAT Physics Electricity Charge Electric Field and Electric Potential MCQ

Question: Current between two points will not be flowing if :

• a) Both the points have same potentials
• b) Circuit is open
• c) Potential difference between the point is zero
• d) All of them

Answer: All of them

Question: If ‘I’ is the current through a wire and e is the charge of electron, the number of electrons in it second will be given by :

• a)

  

• b) lte
• c)

  

• d)

  

Answer:

Question:  Two particles having charges q1 and a2 when kept at a certain distance exert force F on each other. If distance is reduced to half, force between them becomes :

• a)

  

• b) 2F
• c) 4F
• d)

  

Answer: 4F

Question: All the following statements are correct except :

• a) A body is said to be positively charged when it has got excess of electrons
• b) When a body is charged positively, some electron escape from it
• c) The presence of moisture in the air reduces the conductivity of charge
• d) None of the above

Answer: The presence of moisture in the air reduces the conductivity of charge

Question:    coulomb of charge contain _______electrons : 

• a) 10¹⁵  
• b) 10¹⁸ 
• c) 10²⁰   
• d) None of these

Answer: 10¹⁸ 

Question: Assuming the charge of electron is 1.6 × 10^-19 C, the number of electrons passing through a section of wire per second, When the wire carries a current of 1 A is : 

• a) 6.25 × 10¹⁸ 
• b) 1.6 × 10^-19 
• c) 1.6 × 10¹⁹ 
• d) 0.625 × 10¹⁷

Answer: 6.25 × 10¹⁸ 

Question: 24 J work is done is moving a charge q between two points having potential difference 12 volt. The value of charge q is :

• a) 2 D
• b) 0.5 C
• c) 24 C
• d) 12 C

Answer: 2 D

Question: If current drawn from a cell is increased, then the potential difference across the terminals of the cell will :

• a) Increase
• b) Decrease
• c) Remains same
• d) None of these

Answer: Decrease

Question: The efficiency of a cell is 50 Ah. If will give 0.5 amp current up to :

• a) 50 h
• b) 100 h
• c) 25 h
• d) 0.5 h

Answer: 100 h

More Questions................

Question: A metallic sphere is charged negatively, its mass will :

• a) Increase
• b) Decrease
• c) Remains same
• d) None of these

Answer: Increase

Question: C.G.S. unit of charge is :

• a) Coulomb
• b) State coulomb
• c) Newton × coulomb
• d) Ampere

Answer: State coulomb

Question: Current between two points will not be flowing if :

• a) Both the points have same potentials
• b) Circuit is open
• c) Potential difference between the point is zero
• d) All of them

Answer: All of them

Question: Charge of electron in state coulomb is.

• a) 1.6 × 10^-19  
• b) 4.8 × 10^-10      
• c) 3.2 × 10^-19
• d) 4.8 × 10¹⁰

Answer: 4.8 × 10^-10      

Question: When the distance between two charges is reduced to half of the original distance the force between them will remain the same if one of the charge is made :

• a) Double
• b) Four times
• c) Half
• d) One fourth

Answer: One fourth

Question: A metallic sphere is charged negatively, its mass will :

• a) Increase
• b) Decrease
• c) Remains same
• d) None of these

Answer: Increase