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

Two deuterons are fused to form one alpha particle. If binding energy per nucleon of deuterium is 1.05 MeV and that of alpha particle is 7 MeV , what is the energy released in the formation of one alpha particle from the fusing of two deuterons?

A

24.8 MeV

B

23.8 MeV

C

26.8 MeV

D

28.3 MeV

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

If wattless current flows in an AC circuit, then the circuit is:

A. LR circuit

B. Purely capacitive circuit

C. Purely resistive circuit

D. LCR circuit

A

B

B

C

C

D

D

A

3
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0
COMEDK 2026 Morning Shift Physics - Semiconductor Devices and Logic Gates Question 4 English

In the circuit given, the reverse breakdown voltage of the Zener diode is 4.8 V . The current through the Zener and the power dissipation in Zener is:

A

$22.4 \mathrm{~mA} ; 107.52 \mathrm{~mW}$

B

$2.88 \mathrm{~mA} ; 13.82 \mathrm{~mW}$

C

$28.8 \mathrm{~mA} ; 138.24 \mathrm{~mW}$

D

$12.4 \mathrm{~mA} ; 97.52 \mathrm{~mW}$

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

In a Young's double slit experiment, the slits are separated by 0.5 mm . Fringes are obtained on a screen which is placed at distance 1 m away from the slits. When the screen is moved 7 cm farther away, the fringe width changes by $63 \mu \mathrm{~m}$. The wavelength of light used in the experiment will be:

A

$4.5 \times 10^{-6} \mathrm{~m}$

B

$4.5 \times 10^{-7} \mathrm{~m}$

C

$0.5 \times 10^{-9} \mathrm{~m}$

D

$0.5 \times 10^{-7} \mathrm{~m}$