Three particles A, B and C, each of mass m, are placed in a line with AB = BC = l. Find the gravitational force on a fourth particle P of same mass, placed at a distance l from the particle B on the perpendicular bisector of the line AC.

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Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval (a) Equal amount of thermal energy must be produced in the resistors(b) Unequal amounts of thermal energy may be produced (c) The temperature must rise equally in the resistors (d) The temperature must rise unequally in the resistors

If current in an electric bulb changes by 1%, then the power will change by (a) 1%(b) 2%1000 OF(c) 4% anda darse(d) =%2

Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then

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If current in an electric bulb changes by 1%, then the power will change by (a) 1%(b) 2%1000 OF(c) 4% anda darse(d) =%2

Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then

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