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

In a uniform electric field $10^6 N C^{-1}$ an electric dipole of length 4 cm is placed with its axis making an angle $60^{\circ}$ with the electric field. If the dipole experiences a torque of $8 \sqrt{3} \mathrm{~N} \mathrm{~m}$.

Find the potential energy of the dipole.

A

$-8 J$

B

$ 8 J$

C

$-16 J$

D

$16 J$

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

The variation of the stopping potential ( $\mathrm{V}_{\mathrm{o}}$ ) with the frequency of incident radiation( $n$ ) is as given below.

[no - threshold frequency. h - Planck's constant e-electronic charge] then the slope of the graph AB with the frequency axis is:

COMEDK 2026 Afternoon Shift Physics - Dual Nature of Radiation Question 1 English

A

$\frac{h}{e}$

B

$\frac{h n_0}{V_0}$

C

$\frac{n_0}{V_0}$

D

$$ \frac{V_0}{n_0} $$

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

An object placed 40 cm in front of a thin convex lens is moved to 60 cm from the lens. If the focal length of the lens is 30 cm the ratio of magnification of the image at the initial position to the final position is:

A

$3: 2$

B

$2: 3$

C

$1: 3$

D

$3: 1$

4
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 $\mathrm{T}^{\prime}$