CUET UG 2023 Physics Question Paper (25-May-2023) (Shift 3)

Question 1

In the shown AC source, the voltage is given as V = 20 cos 2000t. Neglecting source resistance, the voltmeter and ammeter readings will be:

Accepted Answer

0 V, 1.4 A

Answer

1.68 V, 0.47 A

Answer

0 V, 14 A

Answer

5.6 V, 1.4 A

Question 2

If the forward voltage in a p-n junction diode is increased, the width of the depletion region:

Accepted Answer

Decreases

Answer

Increases

Answer

No change

Answer

Fluctuates

Question 3

The work function for an Aluminium surface is 4.2 eV. Find the threshold wavelength for the photoelectric emission.

Accepted Answer

2959 Å

Answer

4200 Å

Answer

4736 Å

Answer

5890 Å

Question 4

The half-life period of a radioactive element 'X' is same as the mean life of another radioactive element Y. Initially both of them have the same no. of atoms, then:

A. X and Y have the same decay rate initially.

B. X and Y decay at the same rate always.

C. Y will decay at a faster rate than X.

D. X will decay at a faster rate than Y.

Choose the correct answer from the options given below:

Accepted Answer

C only

Answer

A and B only

Answer

A only

Answer

B and D only

Question 5

A Convex mirror produces the magnification 1/3 and 1/4 when the object is placed at the points P and Q in front of the mirror.

Accepted Answer

Q is far from the mirror as compared to P.

Answer

P is far from the mirror as compared to Q.

Answer

P and Q both are coinciding.

Answer

Convex mirror produces the magnification always greater than 1.

CUET UG 2023 Physics Question Paper (25-May-2023) (Shift 3)

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