CUET 2025 Physics MCQ Test 4 - 20 MCQs for Practice

1. Which one of the following is not the advantage of semiconductor device in the electron tubes?

a.Unlimited life

b.No warming up time for switching

c.Greater efficiency

d.Low consumption of power for cathode heating

2. Two wires of the same material and length are stretched by the same force. Their masses are in the ratio 3:2, their elongations are in the ratio:

a.2:03

b.4:09

c.3:02

d.9:04

3. For gases:

a.both the elasticities are equal

b.isothermal elasticity is greater than adiabatic elasticity

c.adiabatic elasticity is greater than isothermal elasticity

d.none of the above

4. In a common-base mode of transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (β) will be:

a.51

b.50

c.49

d.48

5. When we apply reverse bias to a junction diode, it:

a.lowers the potential barrier

b.greatly increases the majority carrier current

c.raises the potential barrier

d.greatly increases the minority carrier current

6. A lorry and a car, moving with the same KE are brought to rest by applying the same retarding force then:

a.none of the above

b.car will come to rest in a shorter distance

c.both will come to rest in the same distance

d.lorry will come to rest in a shorter distance

7. The time period of a simple pendulum at the centre of earth is:

a.none of these

b.zero

c.less than zero

d.infinite

8. In which of the following cases the potential energy is defined?

a.Conservative force only

b.Non-conservative force only

c.Both conservative and non-conservative forces

d.Neither conservative nor non-conservative forces

9. Youngs modulus for perfectly inelastic body is:

a.finite

b.infinity

c.one

d.zero

10. Mark correct option.

a.If internal forces are non-conservative, the net work done by internal forces must be zero

b.The negative change in potential energy is equal to work done

c.Mechanical energy of a system remains constant

d.None of the above

11. If a metal wire of length L, having area of cross-section A and Youngs modulus Y, behaves as a spring of spring constant k. The value of k is:

a.YA/L

b.YA/2L

c.YL/A

d.2YA/L

12. The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the:

a.crystal structure

b.type of bonding

c.variation of scattering mechanism with temperature

d.variation of the number of charge carriers with temperature

13. When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy, then r and v change as:

a.r and v both will increase

b.r will decrease and v will increase

c.r will increase and v will decrease

d.r and v both will decrease

14. What happen to the elastic property of a substance after annealing (cooling slowly after heating)?

a.Remains as such

b.Increases

c.Becomes zero

d.Decreases

15. The time period of an earths satellite in circular orbit is independent of:

a.both the mass and radius of the orbit

b.the mass of the satellite

c.radius of its orbit

d.neither the mass of the satellite nor the radius of its orbit

16. When p-n junction diode is forward biased, then:

a.the depletion region is reduced and barrier height is increased

b.the depletion region is widened and barrier height is reduced

c.both the depletion region and barrier height are reduced

d.both the depletion region and barrier height are increased

17. A p-n junction diode is reverse biased. The resistance measured by an ohmmeter connected across it will be:

a.high

b.low

c.infinite

d.zero

18. If the distance between the two particles is increased by 2%, then the force of attraction between them will:

a.decrease by 4%

b.increase by 6%

c.increase by 4%

d.decrease by 6%

19. When the body is moving up, the acceleration due to gravity will be:

a.downward

b.sideways

c.nil

d.upward

20. The time period of artificial satellite in a circular orbit of radius R is T. The radius of the orbit in which time period is 8T is:

a.2R

b.4R

c.5R

d.3R

CUET 2025 Physics MCQ Test 4 – 20 MCQs for Practice

Physics MCQ Test 4 for CUET 2025

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