Ans: E When the speed at which a conductor is moved through a magnetic field is

Question

Ans: E When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage A) Remains constant. B) Increases. C) Decreases. D) Reaches to zero. 6. 7. Increasing the number of slits will increase the A) Wavelength of light. B) Wave number of fringes. C) Only Amplitude of each peak and becomes sharper. D) None of the above 8. If we switch from red laser (?-670 nm) to green laser ( ? 532 nm) in a Young's double slit diffraction experiment then, A) Separation between the fringes increased B) Position of Principle maxima (m-0) changed by 138 nm. C) Separation between fringes decreased. D) All of the above are true. 9 An R-C circuit has a resistor of 100 k? and a capacitor of25ud. What is the time constant? A) 0.25 s B)2.5sC)25000s D) 25s ume the measured time constant for another RC circuit is 40s. The voltage on the power supply is set to 10V. The equation of the best fit line to an exponential fit of the voltage vs time data for the discharging capacitor should be 10. Ass A) y- 10.0 e 0 0025 B) y 10.0e-0x

Explanation / Answer

6. Increases as e=BLV

7. C) amplitude increases and peak get more sharper

8. c)

As Green light has a smaller wavelength than red, so the fringe width will decrease.

Fringe width = (wavelength x (distance between the screen and slits)) / (separation of the slits)

So as the wavelength decreases, the fringe width also decreases .

9. b) Time constant = RC so 2.5 sec

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