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Example exam qs

# Example exam qs - 1 Two charged particles Q1 = 6 C with...

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1 1. Two charged particles, Q 1 = 6 μC with mass 2 g and Q 2 = 3 μC with mass 1 g, are placed at points A and B which are 8 cm apart. (a) If Q 1 is released from rest at point A, calculate: (i) The acceleration of Q 1 as it is being released. (ii) The speed of Q 1 after a very long time. (b) If both charges are released simultaneously from rest at points A and B, calculate the speed of Q 1 after a very long time. Q 1 Q 2 8 cm 2. Two equal charges, each of 8 μC, are 8 m apart. Point A is 3 m below the midpoint of the two charges. a) What is the potential at point A? b) What is the electric field at point A? c) A particle of mass 5 μg and charge – 2 nC is released from rest at point A. What is its initial acceleration? d) What will be the speed of this particle After traveling a distance of 3 m? 8 μC 8 μC 3 m A 3. Consider the circuit shown: a) R eq = ? b) Current in 15 resistor? c) Power dissipated in the 40 resistor? d) If the battery is rated at 20 A.h., how long will it last? 40 20 15 8 40 V 4. Consider the circuit shown. (a)The capacitor is fully charged.

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Example exam qs - 1 Two charged particles Q1 = 6 C with...

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