AIPMT 2015 | Current Electricity Question 49 | Physics

AIPMT 2015

MCQ (Single Correct Answer)

-1

Two metal wires of identical dimensions are connected in series. If $$\sigma $$₁ and $$\sigma $$₂ are the conductivity of the combination is

$${{{\sigma _1} + {\sigma _2}} \over {{\sigma _1}{\sigma _2}}}$$

$${{{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$$

$${{2{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$$

$${{{\sigma _1} + {\sigma _2}} \over {2{\sigma _1}{\sigma _2}}}$$

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

A potentiometer wire has length 4 m and resistance 8 $$\Omega $$. The resistance that must be connected in series with the wire and an accumulator of e.m.f. 2 V, so as to get a potential gradient 1 mV per cm on the wire is

44 $$\Omega $$

48 $$\Omega $$

32 $$\Omega $$

40 $$\Omega $$

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are V_A, V_B and V_C respectively, Then

AIPMT 2015 Cancelled Paper Physics - Current Electricity Question 101 English

AIPMT 2015 Cancelled Paper Physics - Current Electricity Question 101 English

V_A = V_B $$ \ne $$ V_C

V_A $$ \ne $$ V_B $$ \ne $$ V_C

V_A = V_B = V_C

V_A $$ \ne $$ V_B = V_C

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is

drift velocity

electric field

current density

current

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution