Ohms Law - Questions & Answers | Exam2Win

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6. Three resistance are connected to from the side of a triangle ABC. If the resistances AB, BC, CA respectively are 40 ohm, 60 ohm, and 100 ohm, the effective resistance between the points A and B

A. 32 Ω

B. 50 Ω

C. 64 Ω

D. 200 Ω

Explanation:

7. The resistance of a conductor is due to

A. the flow of current in the conductor

B. the collision of electrons with atoms

C. The attractive force between electrons and protons

D. the thermal agitation of electrons

Explanation:

8. The unit of conductivity is

A. ohm-metre

B. mho-metre

C. mho-metre-1

D. ohm-metre-1

Explanation:

9. Two resistors of 6 Ω and 4 Ω are connected in parallel and the combination is connected in series with a resistance of 2.6 Ω and an accumulator of e.m.f. 2V. The current in the circuit in ampere is

A. 2/12.6

B. 2/26.6

C. 2/5

D. 2/4.6

Explanation:

10. The current in an electric circuit is

A. proportional to the resistance

B. proportional to the conductance

C. inversely proportional to the potential difference

D. proportional to temperature

Explanation:

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