1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The voltage - current graph for a metal wire of uniform area of cross section at two different temp $T$ and $T^{\prime}$ is shown.

Then choose the correct statement:

COMEDK 2026 Afternoon Shift Physics - Current Electricity Question 1 English

A

Resistivity is independent of temperature

B

Resistance of the conductor at temperature T is greater than resistance of the conductor at temperature $\mathrm{T}^{\prime}$

C

Temperature $\mathrm{T}^{\prime}$ is greater than temperature T

D

Temperature T is greater than temperature $\mathrm{T}^{\prime}$

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An electronic device operates at 2 MHz . The oscillating circuit has an inductance $20 \times 10^{-5} \mathrm{H}$. What is the capacitive reactance of the resonant circuit?

A

$251.2 \Omega$

B

$2512 \Omega$

C

$1256 \Omega$

D

$5024 \Omega$

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A singer, during his performance, stands on the edge of a circular turntable, and begins to walk along its edge with a speed of $1.5 \mathrm{~ms}^{-1}$ relative to the ground. The turn table is mounted on a frictionless vertical axle. Its radius R =3m and its moment of inertia about the axle is $150 \mathrm{~kg} \mathrm{~m}^2$. It is initially at rest. If the mass of the singer is 75 kg , the time taken by the man to complete one revolution is:

A

12.57 s

B

8.56 s

C

6.28 s

D

20.5 s

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A pith ball of mass ' $m$ ' gram and charge ' $Q$ ' is suspended using a mass less silk thread near a large charged conducting metal sheet of area ' $A$ ' and surface charged density ' $\sigma$ '. If the silk thread makes an angle $\Theta$ with the metal sheet, then:

A

$\tan \theta \propto \sigma$

B

$\tan \theta \propto A$

C

$\tan \theta \propto m g$

D

$\tan \theta \propto \frac{1}{\sigma}$