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**PHYSICS MCQs (SET-1)**

*FOR NEET - IIT JEE and Other Engineering or premedical Entrance Examinations*

**Q1: A neutron with velocity v strikes a stationary deuterium atom, its kinetic energy changes by a factor of**

(a) 15/16

(b) 1/2

(c) 2/1

(d) 8/9

**Q2: AM radio band has carrier frequency from 500 kHz to 1500 kHz. Assuming a fixed inductance in a simple LC circuit, what is ratio of highest capacitance to lowest capacitance required to cover this frequency range?**

(a) 3

(b) 6

(c) 9

(d) 12

**Q3: A screw gauge has 100 divisions on circular scale and pitch is 0.5 mm. When we fix a wire between it's jaws, it reads 2 divisions on main scale and 48 divisions on circular scale. If the screw gauge has no zero error, radius of wire is:**

(a) 2.48 mm

(b) 1.24 mm

(c) 0.62 mm

(d) 0.31 mm

**Q4: The relation 3t= (3x)**

^{ ½}+6; describes the displacement of a particle in one direction where x is in metre and t in second. The displacement, when velocity is zero, is(a) 24m

(b) 12m

(c) 8m

(d) zero

**Q5: The temperature of a radiating body increases by 30%. Then, the increase in the amount of radiation emitted will be approximately**

(a) 185%

(b) 285%

(c) 325%

(d) 245%

**Q6: If rotating annular disc is heated, what happens to its angular momentum and angular velocity ?**

(a) Angular momentum decreases, angular velocity decreases.

(b) Angular momentum remains constant, angular velocity increases.

(c) Angular momentum remains constant, angular velocity decreases.

(d) Angular momentum increases, angular velocity remains constant.

**Q7: Two symmetrical double convex lenses A and B have same focal length, but the radii of curvature differ so that Ra = 0.9 Rb. If μA =1.63, find μB.**

(a) 1.7

(b) 1.6

(c) 15

(d) 1.33

**Q8: The frequency of an organ pipe closed at one end in fundamental mode is f**₀

**. The frequency**

**of second overtone is:**

(a) 2f₀

(b) 3f₀

(c) 4f₀

(d) 5f₀

**Q9: When two spheres of equal masses undergo glancing elastic collision with one of them at rest, after collision they will move**

(a) opposite to one another

(b) in the same direction

(c) together

(d) at right angle to each other

**Q10: Rutherford's planetary model of atom was rejected because:**

(a) this would suggest that atom was mostly empty.

(b) the accelerating electron would rapidly lose energy.

(c) such a nucleus cannot undergo b–decay.

(d) it cannot explain atomic spectra.

**Answers:**

1: (d) 8/9 [Hint apply conservation of momentum and K.E. to find relation.]

2: (c) 9

3: (c) 0.62 mm

4: (d) zero [Hint differentiate v = dx/dt]

5: (a) 185%

6: (c) Angular momentum remains constant, angular velocity decreases.

7: (a) 1.7 [Use 1/f = (μ-1)(1/R1 - 1/R2)]

8: (d) 5f₀

9: (d) at right angle to each other

10: (b) the accelerating electron would rapidly lose energy.

☞ See Also:

Physical Constants

Types of Vectors

Simple Physics Quiz

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