Dual Nature of Radiation and Matter

1. A.
   $3{\cdot}87 \times 10^{-43}\ \mathrm{kg\ ms^{-1}}$
2. B.
   $2{\cdot}5 \times 10^{-30}\ \mathrm{kg\ ms^{-1}}$
3. C.
   $2{\cdot}65 \times 10^{-27}\ \mathrm{kg\ ms^{-1}}$
4. D.
   $1{\cdot}33 \times 10^{-27}\ \mathrm{kg\ ms^{-1}}$

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1. A.
   $1{\cdot}66 \times 10^{-32}\ \mathrm{kg\ ms^{-1}}$
2. B.
   $1{\cdot}83 \times 10^{-34}\ \mathrm{kg\ ms^{-1}}$
3. C.
   $2{\cdot}05 \times 10^{-34}\ \mathrm{kg\ ms^{-1}}$
4. D.
   $1{\cdot}66 \times 10^{-34}\ \mathrm{kg\ ms^{-1}}$

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1. A.
   $\mathrm{V_1 = V_2 = V_3}$
2. B.
   $\mathrm{V_2 > V_1 > V_3}$
3. C.
   $\mathrm{V_1 > V_2 > V_3}$
4. D.
   $\mathrm{V_3 > V_1 > V_2}$

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1. A.
   work function of the surface '$\phi_0$' only.
2. B.
   frequency of the incident radiation '$\nu$' only.
3. C.
   intensity of the incident radiation 'I' only.
4. D.
   Both $\phi_0$ and $\nu$.

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1. A.
   Red light
2. B.
   Yellow light
3. C.
   Green light
4. D.
   Blue light

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1. A.
   $3{\cdot}5$ eV
2. B.
   $3{\cdot}0$ eV
3. C.
   $2{\cdot}5$ eV
4. D.
   $2{\cdot}0$ eV

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1. A.
   cut-off potential will decrease.
2. B.
   cut-off potential will increase.
3. C.
   saturation current will decrease.
4. D.
   saturation current will increase.

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1. A.
   Only Na and K show photoelectric emission.
2. B.
   Only Mo will not show photoelectric emission.
3. C.
   All of the given metals show photoelectric emission.
4. D.
   None of them show photoelectric emission.

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1. A.
   2, 1
2. B.
   1, 2
3. C.
   4, 1
4. D.
   1, 4

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1. A.
   increase by 100% of its initial value.
2. B.
   increase by 50% of its initial value.
3. C.
   decrease by 25% of its initial value.
4. D.
   decrease by 50% of its initial value.

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1. A.
   $2.21 \times 10^{-35}$ kg
2. B.
   $6.63 \times 10^{-33}$ kg
3. C.
   $1.11 \times 10^{-35}$ kg
4. D.
   $3.31 \times 10^{-33}$ kg

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1. A.
   Wavelength of incident radiation only
2. B.
   Intensity of incident radiation only
3. C.
   Work function of the surface only
4. D.
   Both wavelength of the incident radiation and work function of the surface

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1. A.
   $\frac{1}{3}$
2. B.
   $\frac{3}{4}$
3. C.
   $\frac{2}{3}$
4. D.
   $\frac{3}{2}$

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1. A.
   cut-off potential will increase.
2. B.
   maximum kinetic energy of photoelectrons will remain the same.
3. C.
   photocurrent will increase.
4. D.
   cut-off potential will decrease.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false and Reason (R) is also false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Both Assertion (A) and Reason (R) are false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Both Assertion (A) and Reason (R) are false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Both Assertion (A) and Reason (R) are false.

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1. A.
   $\nu_1$ and $\nu_2$
2. B.
   $V_1$ and $V_2$
3. C.
   $h\nu_1$ and $h\nu_2$
4. D.
   $\frac{h\nu_1}{e}$ and $\frac{h\nu_2}{e}$

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1. A.
   greater for metal A because it has a smaller work function.
2. B.
   greater for metal B because it has a larger work function.
3. C.
   greater for metal B because it has higher threshold frequency.
4. D.
   the same for both metal A and metal B because it is independent of work functions of metals.

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1. A.
   the slope of the parallel lines will increase.
2. B.
   the slope of the parallel lines will decrease.
3. C.
   the threshold frequencies for both A and B will decrease.
4. D.
   the slope of the parallel lines will not change but more electrons will be emitted per second.

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1. A.
   1/3
2. B.
   1/2
3. C.
   2/5
4. D.
   3/4

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1. A.
   me
2. B.
   $\frac{1}{me}$
3. C.
   $\frac{m}{e}$
4. D.
   $\frac{e}{m}$

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1. A.
   $1{\cdot}18 \times 10^{14}$ Hz
2. B.
   $3{\cdot}20 \times 10^{14}$ Hz
3. C.
   $4{\cdot}20 \times 10^{15}$ Hz
4. D.
   $4{\cdot}80 \times 10^{15}$ Hz

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1. A.
   $10^{16}$
2. B.
   $10^{24}$
3. C.
   $10^{10}$
4. D.
   $10^{20}$

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1. A.
   Photons of light show diffraction whereas electrons do not show diffraction.
2. B.
   Electrons have momentum whereas photons do not have momentum.
3. C.
   Photons of light and electrons both exhibit dual nature.
4. D.
   All electromagnetic radiations do not have photons.

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1. A.
   mh
2. B.
   $\frac{m}{h}$
3. C.
   $\frac{h}{m}$
4. D.
   $\frac{1}{mh}$

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1. A.
   0.4 eV
2. B.
   2.1 eV
3. C.
   2.5 eV
4. D.
   4.6 eV

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1. A.
   X-rays
2. B.
   AM radio waves
3. C.
   Microwaves
4. D.
   TV waves

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1. A.
   Balmer series
2. B.
   Paschen series
3. C.
   Lyman series
4. D.
   Neither Balmer, nor Paschen nor Lyman series

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1. A.
   $0{\cdot}75$ nm
2. B.
   $1{\cdot}2$ nm
3. C.
   $2{\cdot}4$ nm
4. D.
   $0{\cdot}55$ nm

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1. A.
   energy
2. B.
   angular momentum
3. C.
   velocity
4. D.
   linear momentum

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1. A.
   Red light
2. B.
   Blue light
3. C.
   Violet light
4. D.
   Green light

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1. A.
   The blue beam has more number of photons than the red beam.
2. B.
   The red beam has more number of photons than the blue beam.
3. C.
   Wavelength of red light is lesser than wavelength of blue light.
4. D.
   The blue light beam has lesser energy per photon than that in the red light beam.

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1. A.
   $\lambda_d > \lambda_p > \lambda_e$
2. B.
   $\lambda_e > \lambda_p > \lambda_d$
3. C.
   $\lambda_p > \lambda_e > \lambda_d$
4. D.
   $\lambda_e = \lambda_p = \lambda_d$

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1. A.
   $6{\cdot}63 \times 10^{-25}$
2. B.
   $1{\cdot}326 \times 10^{-27}$
3. C.
   $2{\cdot}652 \times 10^{-26}$
4. D.
   $3{\cdot}978 \times 10^{-24}$

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1. A.
   $\dfrac{1}{16}$
2. B.
   $\dfrac{1}{8}$
3. C.
   $\dfrac{1}{4}$
4. D.
   $\dfrac{1}{2}$

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Both Assertion (A) and Reason (R) are false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Both Assertion (A) and Reason (R) are false.

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1. A.
   coincide each other.
2. B.
   are parallel to each other.
3. C.
   are not parallel to each other and cross at a point on $\nu$-axis.
4. D.
   are not parallel to each other and do not cross at a point on $\nu$-axis.

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1. A.
2. B.
3. C.
4. D.

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1. A.
   increases linearly
2. B.
   decreases
3. C.
   increases non-linearly
4. D.
   remains the same

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1. A.
   $\frac{e}{m}$
2. B.
   $\frac{1}{me}$
3. C.
   me
4. D.
   $\frac{m}{e}$

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1. A.
   Photocurrent versus Intensity of incident light
2. B.
   Photocurrent versus Frequency of incident light
3. C.
   Cut-off potential versus Frequency of incident light
4. D.
   Cut-off potential versus Intensity of incident light

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1. A.
   $\nu_0,\ \frac{h\nu_0}{e}$
2. B.
   $\nu_0,\ h\nu_0$
3. C.
   $\frac{h\nu_0}{e},\ \nu_0$
4. D.
   $h\nu_0,\ \nu_0$

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1. A.
   $K_R > K_Y > K_B$
2. B.
   $K_Y > K_B > K_R$
3. C.
   $K_B > K_Y > K_R$
4. D.
   $K_R > K_B > K_Y$

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1. A.
   $2,\ \frac{1}{2}$
2. B.
   $\frac{1}{2},\ \frac{1}{2}$
3. C.
   $\frac{1}{2},\ 2$
4. D.
   2, 2

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1. A.
   $1.33\ \mu\mathrm{m}$
2. B.
   $3.3\ \mu\mathrm{m}$
3. C.
   $16.6\ \mu\mathrm{m}$
4. D.
   $13.3\ \mu\mathrm{m}$

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1. A.
   Caesium
2. B.
   Zinc
3. C.
   Cadmium
4. D.
   Magnesium

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1. A.
   there is a minimum frequency of incident radiation below which no electrons are emitted.
2. B.
   the maximum kinetic energy of photoelectrons depends only on the frequency of incident radiation.
3. C.
   when the metal surface is illuminated, electrons are ejected from the surface after sometime.
4. D.
   the photoelectric current is independent of the intensity of incident radiation.

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1. A.
   $0{\cdot}54$ eV
2. B.
   $1{\cdot}07$ eV
3. C.
   $1{\cdot}61$ eV
4. D.
   $2{\cdot}14$ eV

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1. A.
   A
2. B.
   B
3. C.
   C
4. D.
   D

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1. A.
   $4 \times 10^{-27}$
2. B.
   $8 \times 10^{-28}$
3. C.
   $2 \times 10^{-30}$
4. D.
   $6 \times 10^{-29}$

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1. A.
   150 nm
2. B.
   200 nm
3. C.
   375 nm
4. D.
   500 nm

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1. A.
   $\dfrac{\lambda}{\sqrt{2}}$
2. B.
   $\dfrac{\lambda}{2}$
3. C.
   $\sqrt{2}\ \lambda$
4. D.
   $2\,\lambda$

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1. A.
   $\phi_1 > \phi_2 > \phi_3$
2. B.
   $\phi_2 > \phi_3 > \phi_1$
3. C.
   $\phi_3 > \phi_2 > \phi_1$
4. D.
   $\phi_2 > \phi_1 > \phi_3$

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1. A.
2. B.
3. C.
4. D.

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1. A.
   3
2. B.
   9
3. C.
   $\dfrac{1}{3}$
4. D.
   $\dfrac{1}{9}$

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1. A.
   momentum
2. B.
   angular momentum
3. C.
   speed
4. D.
   energy

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false and Reason (R) is also false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false and Reason (R) is also false.

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1. A.
   If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
2. B.
   If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
3. C.
   If Assertion (A) is true and Reason (R) is false.
4. D.
   If both Assertion (A) and Reason (R) are false.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false and Reason (R) is also false.

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