Electric Charges and Fields

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Question

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Question 1 : Which one of the following is the unit of electric field?
1. Coulomb
2. Newton
3. Volt
4. N/C
Answer
8954

Question 2 : Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to make the net force on q to be zero, the value of Q will be
1. +2q
2. +3q
3. -3q
4. -4q
Answer
8955

Question 3 : If an electric dipole is kept in a uniform electric field then resultant electric force on it is ______________
1. never zero
2. always zero
3. depend upon capacity of dipole
4. None
Answer
8956

Question 4 :

The number of electron-taken out from a body to produce 1 coulomb of charge will be ______________

1. 6.023 × 10²³
2. 625 × 10¹⁸
3. 6.25 × 10¹⁸
4. None
Answer
8957

Question 5 : The work done in rotating an electric dipole in an electric field ____________
1. W = ME tan θ
2. W = ME sec θ
3. W = ME (1 – cos θ)
4. All of these
Answer
8958