A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value? A. 90 Ohm – 101 ohm B. 90 Ohm – 110 ohm C. 98 Ohm – 100.1 ohm D. 99 Ohm – 102 ohm E. None of the above

The correct answer is: A. 90 Ohm – 101 ohm.

A resistor with a rated value of 100 ohm and a tolerance of 10% means that the actual resistance value can be anywhere between 90 ohm and 110 ohm. This is because the tolerance is a percentage of the

rated value, so 10% of 100 ohm is 10 ohm. Therefore, the minimum allowable resistance value is 100 ohm – 10 ohm = 90 ohm, and the maximum allowable resistance value is 100 ohm + 10 ohm = 110 ohm.

Option B is incorrect because it includes 120

ohm, which is outside the range of 90 ohm to 110 ohm. Option C is incorrect because it includes 98 ohm, which is outside the range of 90 ohm to 110 ohm. Option D is incorrect because it includes 102 ohm, which is outside the range of 90 ohm to 110 ohm. Option E is incorrect because it is not one of the possible answers.