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1 markCurrent Electricity

CSEC Physics · 1993 · Paper 2 · Question 3(a)(i)

Danger of electrical shock depends on body resistance (100 kΩ dry, 1 kΩ wet). 10 mA causes a slight shock; 1.0 A can cause death.

Explain why no current flows when someone touches just ONE terminal of a 12 V car battery.

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Other parts of this question

  1. 3(a)(ii)A boy touches one terminal of a 12 V car battery with his right hand and the other terminal with his left hand simultaneously. Calculate the current flowing…[7 marks]
  2. 3(b)(i)Calculate the electrical energy that is stored in the machine.[3 marks]
  3. 3(b)(ii)The total charge is passed in a current lasting 5 ms. Calculate this current.[3 marks]

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