Force between two charges separated by a certain distance in air is F. If each charge is doubled and the distance between them is also doubled, force would be
(A) F
(B) 2 F
(C) 4 F
(D) F/4
1 Answers
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Two charges of 1.0 C each are placed one meter apart in free space. The force between them will be
Correct answer is (B) 9 × 109 N
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Two point charges of A = +5.0 µC and B = -5.0 µC are separated by 5.0 cm. A point charge C = 1.0 µC is placed at 3.0 cm
Correct answer is (C) a direction parallel to line AB
2 Answers 1 views
If pressure of air gets doubled at constant temperature then velocity of sound in air ………… .
(B) remains unchanged
2 Answers 1 views
The potential difference between two points separated by a distance l in a conductor wire by the electric force on a free charge ‘q’ is …………………….
Correct option is C) V = \(\frac{F.1}{q}\)
2 Answers 1 views
If the angle between moving charge and magnetic field is 0, the magnetic force acting on the charge is given by …………….
Correct option is A) qvB
2 Answers 1 views
The gravitational force of attraction between two bodies is F1 . If the mass of each body is doubled and the distance
D) F2 = 16F1
2 Answers 1 views
The gravitational force between two particles of masses `m_(1)` and `m_(2)` separeted by the same distance, then the gravitational force between them
Correct Answer - C Gravitational force does not depends on the medium between the masses.
2 Answers 1 views
Two particles of masses `4kg` and 6kg` are separated by a distance of `20cm` and are moving towards each other under mutual force of attraction, the p
Correct Answer - A `m_(1)r_(1)=m_(2)r_(2)`
2 Answers 1 views
Two equal like charges in air repel eachother with a force F. By what percentage should each charge be reduced so that the force between them in mediu
This display of light is often called sparking. It occurs due to electric discharge of the electrostatic changes produced in chewing the winter green life saver.
2 Answers 6 views
The force of attraction between two charges separated by certain distance in air is `F_(1)` .If the space between the charges is completely filled wit
Correct Answer - 4 `F=(1)/(4piepsilon_(0)epsilon_(r))(q_(1)q_(2))/(d^(2))`
2 Answers 3 views