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5.An electron (m=9.1x10^(−31)kg) is sent into an electric field of intensity 9.1x10^6 N/c .The acceleration produced is 1.6x10^18 𝑚/𝑠^2 1.6x10^6 𝑚/𝑠^2 1.6x10^(−18) 𝑚/𝑠^2 1.6x10^(−6) 𝑚/𝑠^2

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4.Two equally charged pith balls 3cm apart repel each other with a force of 4x10^(−5)N . The charge on each ball is 2x10^9 C 2x10^(−9) C 2/3x10^9 C 2/3x10^(−9) C

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3. Two charges of +200𝜇C and -200𝜇C are placed at the corners B and C of an equilateral tringle ABC of side 0.1m . The force on a charge of 5 𝜇C placed a is 1800N 1200√3 N 600√3 N 900N

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2.Two charges each 1𝜇𝑐 are at p (2𝑖 ̂ +3𝑗 ̂ +𝑘 ̂) m and Q (𝑖 ̂ +𝑗 ̂ -𝑘 ̂) m . Then the force between them is …………………. 1.100N 2.10N 3.10^4 dyne 4.100 dyne

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1. A charge Q is divided into two parts 𝑞_1 and 𝑞_2 such that they experience maximum force of repulsion when separated by certain distance . The ratio of Q , 𝑞_1 and 𝑞_2 is 1:1:2 1:2:2 2:2:1 2:1:1

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PIC

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When a monochromatic point source of light is at a distance 0.2 m from a photoelectric cell the saturation current and cut off voltage are 12mA and 0.5v . If the same source is palced at 0.4 m away from the same photoelectric cell , then the saturation current , now will be ……………………….

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In a circuit for finding the resistance of a galvanometer by half deflection method , a 6v battery and a high resistance of 11 kῼ are used . The figure of merit of galvanometer is 60𝜇A/division . In the absence of shunt resistance the galvanometer produces a deflection of 𝜃=9 divisions when current flows in the circuit . The value of the shunt resistance that can cause the deflection of 𝜃/2 is closed to ………………..

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Two thin symmetrical lens of different nature have equal radii of curvature of all faces R=20 cm . The lenses are put close together and immersed in water . The focal length of system is 24cm . The difference between refractive indies of the two lenses is ………………………..x1/9 . Refractive index of wirer is 4/3

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The potential difference across 8 ohm resistance is 48v as shown in the figure . The value of potential difference across x and y points will be ……………… volts

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