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Resistance and ohms law
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ The insulation resistance of a cable of length 10 km is 1 Mega Ohm's. For a length of 100 km of same cable, the insulation resistance will be 0.1 Mega Ohm [other wrong options] [Discuss in forum] |
| Q2 ⇒ Three resistances each of R Ω are corrected to form a triangle. The
resistance between any two terminals will be 2/3 R Ω [other wrong options] [Discuss in forum] |
| Q3 ⇒ In an ordinary heater if the length of the coil
is halved, then a given quantity of water will
boil Less time [other wrong options] [Discuss in forum] |
| Q4 ⇒ The temperature-coefficient of resistance of
conductors is Positive [other wrong options] [Discuss in forum] |
| Q5 ⇒ The hot resistance of the filament of a bulb is higher than the cold
resistance because the temperature coefficient of the filament is positive. [other wrong options] [Discuss in forum] |
| Q6 ⇒ n equal resistances are first connected in
series and then connected in parallel. What is
the ratio of the maximum to the minimum
resistance ? n2 [other wrong options] [Discuss in forum] |
| Q7 ⇒ For determining the polarity of the voltage drop across a resistor,
it is necessary to know the direction of current flowing through the resistor. [other wrong options] [Discuss in forum] |
| Q8 ⇒ In a circuit containing two unequal resistors
connected in parallel The voltage drop is same across both the resistances [other wrong options] [Discuss in forum] |
| Q9 ⇒ Which of the following is an ohmic conductor? Constanton [other wrong options] [Discuss in forum] |
| Q10 ⇒ Reciprocal of specific resistance is Specific conductance [other wrong options] [Discuss in forum] |
| Q11 ⇒ The resistance of a straight conductor does
not depend upon its Shape of cross-section [other wrong options] [Discuss in forum] |
| Q12 ⇒ The specific resistance of all metals is most
affected by Temperature [other wrong options] [Discuss in forum] |
| Q13 ⇒ The example of non-ohmic resistance is Diode [other wrong options] [Discuss in forum] |
| Q14 ⇒ When the temperature of metallic conductor
is increased, its resistance Always increases [other wrong options] [Discuss in forum] |
| Q15 ⇒ The specific resistance of a wire depends
upon Its material [other wrong options] [Discuss in forum] |
| Q16 ⇒ The temperature coefficient of resistance of
some material is negative. The material is Gennanium [other wrong options] [Discuss in forum] |
| Q17 ⇒ For which of the following substances the
temperature co-efficient of resistivity is
positive ? Aluminium [other wrong options] [Discuss in forum] |
| Q18 ⇒ Four wires of same material, the same
cross-sectional area and the same
length when connected in parallel give
a resistance of 0.25 ω. If the same four
wires are connected is series the effective
resistance will be 4 ω [other wrong options] [Discuss in forum] |
| Q19 ⇒ If a wire conductor of 0.2 ohm resistance
is doubled in length, its resistance
becomes 0.4 ohm [other wrong options] [Discuss in forum] |
| Q20 ⇒ Which of tite following materials has
the least resistivity? Copper [other wrong options] [Discuss in forum] |
| Or |